Social Media Addiction Lawsuits (2026): KGM Trial, MDL 3047, and TikTok & Snapchat Settlements Explained

Last Updated: March 2026  |  Content reviewed by legal content team (YMYL-compliant, educational use only)

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Quick Answer / Key Takeaway

Social media addiction lawsuits allege that platforms including Facebook, Instagram, TikTok, Snapchat, and YouTube were deliberately engineered to addict children and teenagers. As of March 2026, the first bellwether trial, KGM v. Meta & YouTube, is actively underway in the Los Angeles Superior Court. TikTok and Snapchat settled their claims in this case before trial. Meta and YouTube are proceeding toward a jury verdict widely described as a potential industry inflection point. More than 10,000 individual cases and nearly 800 school district claims are pending nationwide.

What Are the Social Media Addiction Lawsuits About?

The Youth Mental Health Crisis and Platform Design

Social media addiction lawsuits represent one of the most significant mass tort litigations in U.S. history, frequently compared to the landmark tobacco lawsuits of the 1990s. Families, young people, and school districts allege that platforms including Facebook, Instagram, TikTok, Snapchat, and YouTube were designed with features intended to maximize addictive engagement among children and adolescents.

Plaintiffs allege these companies were aware of the potential risks to young users and, according to court filings, either concealed or disregarded those risks. Using techniques plaintiffs compare to those borrowed from slot machines and the tobacco industry, these platforms are alleged to have been engineered to keep teens engaged through dopamine-driven feedback loops at the expense of user safety.

Core Allegations Across All Cases

Plaintiffs across all consolidated cases share the following core allegations:

• Design Defect: Platforms are alleged to be defectively designed to addict children and teens through manipulative features.

•  Algorithm Harm: Recommendation algorithms are alleged to drive compulsive use and push harmful content, including content related to eating disorders, self-harm, suicide, and drug sales, to vulnerable users.

• Failure to Warn: Companies are alleged to have failed to disclose known mental health risks despite internal research that plaintiffs claim confirmed harm.

• Age Verification Failures: Platforms are alleged to have failed to implement adequate age verification, allowing underage users unfettered access.

• Corporate Knowledge: Internal documents introduced at trial are alleged to show executives were aware of platform harms. These allegations are disputed by the defendants.

What Design Features Are Alleged to Be Harmful?

According to court filings and expert testimony, the following platform mechanics have been cited as allegedly unreasonably dangerous:

Platform Feature	Allegation
Infinite scroll	Alleged to eliminate natural stopping cues and exploit impulsivity
Autoplay / content loops	Alleged to keep users watching without an active choice
Variable reward notifications	Alleged to mimic slot machine mechanics and create dopamine-driven feedback loops
Algorithmically personalized feeds	Alleged to intensify addictive use through engagement-maximizing personalization
Beauty filters & idealized content	Alleged to contribute to body dysmorphia
Disappearing messages (Snapchat)	Alleged to facilitate predatory contact
Push notifications	Alleged to re-engage lapsed users and trigger compulsive checking
Short-form video (Reels, TikTok)	Alleged to especially exploit developing adolescent attention spans

Legal Framework: How Did Plaintiffs Overcome Section 230?

The Novel Product Liability Strategy

For decades, Section 230 of the Communications Decency Act (1996) provided near-absolute immunity to social media platforms by shielding them from liability for third-party user content. This protection made it historically difficult to bring suits against social media companies for harms flowing from content posted on their platforms.

Plaintiffs in this litigation advanced a novel legal theory: rather than suing over content, they sued over platform design, arguing that features like infinite scroll and push notifications are defective products in their own right, independent of any specific piece of content. This reframing has proven critical to the litigation's survival.

How Have Courts Ruled on Section 230?

Judges in multiple federal and state proceedings have denied motions to dismiss, allowing claims based on platform design to proceed. Importantly, Section 230 has not been declared categorically inapplicable; rather, courts have found that it does not necessarily shield design-based product liability claims in the circumstances of these cases.

Court / Proceeding	Ruling on Section 230	Outcome
MDL 3047, N.D. California	Section 230 does not bar design-based claims	Cases allowed to proceed
JCCP 5255, L.A. Superior Court	Design defect claims survive Section 230 challenge	KGM trial commenced Feb. 2026
Multiple state courts	Design-based theories proceed; content claims may be barred	Varied by jurisdiction

What Is the First Amendment Defense and How Has It Fared?

Social media companies have also invoked the First Amendment, arguing that their algorithmic curation of content constitutes protected speech. Courts have largely denied motions to dismiss when claims focus on the design of the platform itself, such as infinite scroll and notification systems, rather than the content appearing in users' feeds. The distinction between 'platform design' and 'content curation' has been central to how courts have analyzed First Amendment arguments in this litigation.

Litigation Structure: Federal MDL 3047 and California State Court

Federal MDL 3047

The primary federal litigation is consolidated as MDL No. 3047: In re Social Media Adolescent Addiction/Personal Injury Products Liability Litigation (Case No. 4:22-md-03047-YGR), before Judge Yvonne Gonzalez Rogers in the Northern District of California. Discovery matters are overseen by Judge Peter H. Kang.

Plaintiff Category	Approx. Cases Filed	Notes
Individual personal injury	10,000+	Minors / young adults alleging addiction harm
School districts	~800	Alleging economic harm from youth mental health crisis
State AGs	41+ states	Filed or joined federal and state AG actions

California State Court Proceeding (JCCP 5255)

A parallel coordinated proceeding operates in California state courts (JCCP 5255) before Judge Carolyn B. Kuhl in the Los Angeles Superior Court. The first state bellwether trial, KGM v. Meta & YouTube, commenced with jury selection on January 27, 2026, and trial proceedings began February 10, 2026. As of early March 2026, the plaintiff's case-in-chief has been presented, including testimony by Meta CEO Mark Zuckerberg.

The Landmark Bellwether Trial: KGM v. Meta & YouTube

Why Does the KGM Trial Matter?

Bellwether trials serve a critical function in mass tort litigation: they test the strength of the core legal theory, provide data points for settlement negotiations across thousands of pending cases, and signal to the industry how juries view the underlying allegations. A plaintiff verdict in KGM would place enormous pressure on Meta, YouTube, and the broader industry to settle remaining claims.

Specific Claims in the KGM Case

According to court filings and publicly available trial records, the plaintiff, referred to as Kaley, alleges she began using YouTube at age 6 and Instagram at age 9. Her claims, as presented in open court, include:

• She allegedly developed compulsive use patterns, including up to 16 hours in a single day on Instagram.

• The platforms' alleged addictive design features are claimed to have contributed to anxiety, depression, body dysmorphia, and suicidal ideation.

• She experienced bullying and sextortion on Instagram, according to her allegations in open court.

• Her self-worth allegedly became tied to likes and follower counts, creating a feedback loop of psychological harm, as she testified.

• Platform features, including beauty filters, infinite scroll, and algorithmic amplification, are alleged to have been central to her psychological deterioration.

Internal Corporate Documents Introduced at Trial

Plaintiffs have introduced internal documents as exhibits at trial. According to publicly reported trial proceedings:

• A 2016 internal email allegedly stated that parents of teenage users should not be told about content their children were viewing, as it would "ruin the product from the start." (Meta disputes the characterization of this document.)

• Internal communications in which an Instagram employee allegedly wrote that users were consuming Instagram so heavily that they could no longer feel the reward from it.

• Documents allegedly showing that Meta's legal team instructed researchers to alter data reflecting awareness of teen users' developmental vulnerability. (Per Lieff Cabraser November 2025 brief, on file in JCCP 5255. Meta has disputed this characterization.)

Zuckerberg Testimony (February 18, 2026)

• Meta CEO Mark Zuckerberg testified before the jury in KGM v. Meta & YouTube — his first-ever jury testimony. Based on publicly reported trial coverage:

• Plaintiff attorney Mark Lanier displayed a large collage of the plaintiff's Instagram photos as a child and teenager to illustrate her documented use of the platform.

• Lanier referenced Zuckerberg's 2024 congressional testimony, in which Zuckerberg stated existing research does not prove social media causes mental health harm.

• Zuckerberg declined to pledge funding for social media victims, stating he "disagreed with the characterization" of the question.

• Zuckerberg argued that platform safety features were implemented appropriately and that Meta has invested heavily in youth safety measures.

Note: Direct quotes from trial testimony should be confirmed against official court transcripts before publication. (Sources: Reuters Legal, Law360)

Expert Witness: Dr. Anna Lembke

The plaintiff opened with Dr. Anna Lembke, a Stanford University addiction medicine expert and author of Dopamine Nation, who testified that social media's reward mechanisms activate the same neurological dopamine pathways as gambling and substance addiction (per open court testimony and publicly available reporting). A California judge previously ruled that 10 of the plaintiffs' experts, in psychiatry, neuroscience, pediatrics, and media psychology, may testify at trial.

Defense Arguments

Meta and YouTube have argued that:

• The scientific research does not conclusively establish a causal link between social media use and mental health harm.

• Contributing factors in plaintiffs' lives, including family environment, pre-existing conditions, and other variables, explain the mental health struggles alleged.

• Both companies have invested significantly in youth safety measures and parental controls.

• Heavy use of social media does not meet the clinical definition of addiction.

TikTok & Snapchat Settlements in the KGM Case

Defendant	Settlement Date	Key Details
Snap Inc. (Snapchat)	~January 22, 2026 (approx. 1 week before trial)	Confidential terms; CEO Spiegel had been expected to testify. NOT an admission of liability.
TikTok (ByteDance)	January 27, 2026 (day jury selection was to begin)	Confirmed in open court by plaintiff attorney Mark Lanier. Terms not disclosed. NOT an admission of liability.

Both companies remain defendants in other social media addiction cases across federal and state courts. These settlements apply only to the KGM case and are not admissions of liability.

Broader Litigation Landscape

State Attorneys General's Actions

More than 41 U.S. state attorneys general have filed or joined social media addiction lawsuits. Key state-level actions include:

Date	State / Action	Allegation
Oct. 2023	33 states (federal)	Meta violated COPPA by collecting data on children under 13 without parental consent
Oct. 2024	CA, NY + 15 states	TikTok misled the public on safety; designed to addict young users
Oct. 2024	New Mexico	Internal Snap messages showed the company ignored sextortion reports; failed to verify user ages
Apr. 2025	Florida	Snap violated state law barring children under 16 from creating accounts without parental consent
Jun. 2025	Utah	Fourth social media lawsuit targets Snapchat's alleged addictive features
Dec. 2025	Hawaii	TikTok's dopamine-boosting features are comparable to gambling industry tactics
Nov. 2025	29 state AGs	Petitioned a California federal judge to consolidate claims into a single trial

School District Lawsuits

Nearly 800 school districts nationwide have filed suits against Meta, TikTok, and Snapchat, alleging the platforms contributed to a youth mental health crisis that forces schools to bear significant economic costs, including additional counseling services, safety staff, and academic support programs.

Six school district bellwether cases were selected for the federal MDL, from Maryland, Georgia, Kentucky, New Jersey, South Carolina, and Arizona. Federal trials are expected in late 2026.

Notable Individual Cases (Public Record — Allegations Only, No Verdicts)

• Gabby Cusato (New York): Parents filed a wrongful death lawsuit after their 15-year-old daughter died by suicide; allegations include that Instagram's design allegedly contributed to her death.

• Caroline Koziol (Connecticut): Former competitive swimmer alleges Meta and TikTok allegedly contributed to anorexia during high school.

• California class action (August 2024): A 13-year-old filed a proposed class action against Meta seeking $5 billion in damages for alleged anxiety, depression, and declining academic performance.

• 60+ families (March 2025): Filed wrongful death lawsuits in Los Angeles County alleging Snapchat allegedly facilitated drug sales to teens, leading to fatal overdoses.

• White Mountain Apache Tribe (January 2025): Sued all major platforms alleging a youth mental health crisis on tribal lands, with suicide rates reportedly 3.5–4x the national average.

Regulatory & Legislative Response

Federal Actions

U.S. Surgeon General Dr. Vivek Murthy (June 2024): Called for warning labels on social media platforms — similar to cigarette warnings — alerting users to potential addiction risks.

U.S. Department of Justice (August 2024): Filed suit against TikTok and ByteDance for allegedly illegally collecting data from children under 13 in violation of COPPA.

Congressional Hearings: Mark Zuckerberg and other tech CEOs testified before the Senate Judiciary Committee on child online safety. In January 2024, Zuckerberg apologized to the parents of affected children.

State Legislation

State	Law / Action	Key Provision
California	SB 976 (Sept. 2024)	Bans addictive content feeds for children without parental consent; the 9th Circuit largely upheld in Sept. 2025
Maryland	Online Safety for Minors Act (Feb. 2025)	Nation's first child online safety law; bans sale of children's data; Meta/Google filed First Amendment challenge
New York	Addictive Feed & Bullying Laws (2024–2025)	Addresses addictive feeds, protects children; extended anti-bullying protections statewide (Nov. 2025)
Ohio	Parental consent law (struck down May 2025)	A federal judge struck it down as unconstitutional under the First Amendment, illustrating the ongoing constitutional tension

Litigation Timeline: Key Milestones

Date	Event
2022	MDL 3047 was established in N.D. California before Judge Yvonne Gonzalez Rogers
Oct. 2023	33 state AGs filed a federal lawsuit against Meta re: COPPA violations
Jan. 2024	Zuckerberg testifies before Senate Judiciary Committee; apologizes to families
Jun. 2024	U.S. Surgeon General calls for social media warning labels
Aug. 2024	DOJ sues TikTok/ByteDance for COPPA violations
Sept. 2024	California SB 976 was signed into law
Oct. 2024	CA, NY + 15 states sue TikTok; NM AG reveals internal Snap messages
Feb. 2025	Maryland enacts first child online safety law
Mar. 2025	60+ wrongful death suits filed in L.A. re: Snapchat drug facilitation allegations
Sept. 2025	9th Circuit largely upholds California SB 976
Nov. 2025	29 AGs petition federal MDL court to consolidate AG trial
Jan. 22, 2026	Snapchat settles KGM claims (confidential)
Jan. 27, 2026	TikTok settles KGM claims; jury selection begins in KGM v. Meta & YouTube
Feb. 10, 2026	KGM trial proceedings commence in the Los Angeles Superior Court
Feb. 18, 2026	Mark Zuckerberg testifies before a jury (first-ever jury testimony)
Mar. 2026	Plaintiff's case-in-chief presented; defense case to follow
Spring/Summer 2026	KGM verdict expected
May 11, 2026	Third California state bellwether trial scheduled
Late 2026	First federal MDL jury trials expected (school district bellwether cases)

Documented Harms Alleged in This Litigation

Plaintiffs across these lawsuits allege the following harms were directly caused or significantly exacerbated by social media addiction. These are allegations; causation is a central disputed issue in the ongoing litigation:

• Clinical depression and anxiety disorders

• Body dysmorphia and eating disorders (anorexia nervosa, bulimia nervosa, binge-eating disorder)

• Self-harm and cutting behaviors

• Suicidal ideation and attempted or completed suicide

• Post-traumatic stress disorder (PTSD)

• Sextortion and exploitation by online predators

• Exposure to dangerous viral challenges (e.g., the "Blackout Challenge" on TikTok)

• Fatal drug overdoses are alleged to have been facilitated by drug dealers connecting with minors via social media

• Academic decline and social isolation

• Sleep disorders and insomnia

• are ADHD exacerbation

Scientific & Medical Context: How Is Social Media Addiction Defined?

Important Clinical Clarification: Social media addiction is not currently listed as a distinct disorder in the DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, 5th Edition). The appropriate clinical language is "behavioral addiction," "compulsive use pattern," or "maladaptive behavior pattern."

According to a 2024 article published in the peer-reviewed journal Cureus, social media addiction is characterized by excessive, compulsive use, including cravings and withdrawal-like symptoms, that interfere with daily life. The authors concluded that these characteristics resemble gambling disorder, as both involve similar neurological reward pathways related to dopamine. (Cureus, 2024 — verify DOI before publication)

Warning Signs in Adolescents (Based on Clinical Literature)

Warning Sign	Clinical Description
Preoccupation	Constantly thinking about social media; strong urges to check platforms
Loss of control	Repeated unsuccessful attempts to reduce use
Tolerance	Needing increasing use to achieve the same satisfaction
Withdrawal	Irritability, anxiety, or mood disturbances when unable to access platforms
Displacement	Giving up other activities, hobbies, or relationships for social media

Key Statistics on Teen Social Media Use

The following statistics are sourced from credible research organizations and appear consistently in court filings and media reporting:

Finding	Source
95% of teens aged 13-17 use YouTube; nearly 1 in 5 say they use it "almost constantly."	Pew Research Center
67% of teens use TikTok; 62% use Instagram; 59% use Snapchat	Pew Research Center
Over half of teens (54%) say it would be hard to give up social media	Pew Research Center
1 in 3 teens believes they use social media too much	Pew Research Center
An estimated 5-10% of Americans may meet criteria for social media addiction (~33 million people)	Per plaintiff-side legal reporting, verify independently

What's Next: Upcoming Milestones to Watch

Milestone	Details
KGM verdict (Spring/Summer 2026)	Meta and YouTube's defense case to follow after the plaintiff rests; verdict anticipated in the coming months
Third CA state bellwether trial (May 11, 2026)	Scheduled in California state court under JCCP 5255
Federal MDL bellwether trials (Late 2026)	Six school district cases and five individual cases selected; first federal jury trial expected
State AG consolidated trial	29 state AGs seeking a unified trial in federal MDL against multiple platforms
Massachusetts Supreme Court decision	Ruling expected on whether Instagram can be held liable for design features under Massachusetts law

Frequently Asked Questions (AEO & Voice Search Optimized)

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Q1: What is the social media addiction lawsuit?

The social media addiction lawsuit is a mass tort litigation in which tens of thousands of individuals, families, and school districts have sued platforms including Facebook, Instagram, TikTok, Snapchat, and YouTube. Plaintiffs allege these platforms were deliberately designed to addict children and teenagers, causing depression, anxiety, eating disorders, self-harm, and, in some cases, death. Cases are consolidated in federal MDL 3047 in the Northern District of California and in California state court proceedings (JCCP 5255).

Q2: What is happening in the KGM v. Meta trial in 2026?

KGM v. Meta Platforms, Inc. & YouTube LLC is the first state bellwether trial in this litigation, taking place in the Los Angeles Superior Court. Jury selection began January 27, 2026, and trial proceedings commenced February 10, 2026. The plaintiff alleges she began using YouTube at age 6 and Instagram at age 9, and that the platforms' design contributed to compulsive use, body dysmorphia, anxiety, depression, and suicidal ideation. TikTok and Snapchat settled their claims before trial. Meta CEO Mark Zuckerberg testified before the jury on February 18, 2026, his first-ever jury testimony. A verdict is expected in spring or summer 2026.

Q3: Did TikTok and Snapchat settle the social media addiction lawsuits?

TikTok and Snapchat both reached confidential settlements with the plaintiff in the KGM bellwether case before trial. Snap's settlement was reached approximately one week before trial (around January 22, 2026). TikTok's settlement was reached on January 27, 2026, the day jury selection was scheduled to begin, and was confirmed in open court by plaintiff attorney Mark Lanier. Neither settlement constitutes an admission of liability. Both companies remain defendants in other social media addiction lawsuits across federal and state courts.

Q4: How many social media addiction lawsuits are currently filed?

As of early 2026, the litigation includes more than 10,000 individual personal injury cases, nearly 800 school district lawsuits, and actions by attorneys general from more than 41 U.S. states. The primary federal consolidation is MDL 3047 (Case No. 4:22-md-03047-YGR) in the Northern District of California. A parallel proceeding operates in the California state court (JCCP 5255).

Q5: Is social media addiction recognized as a medical condition?

Social media addiction is not currently listed as a distinct disorder in the DSM-5. The appropriate clinical terminology is 'behavioral addiction,' 'compulsive use pattern,' or 'maladaptive behavior pattern.' However, a 2024 peer-reviewed article in the journal Cureus described it as sharing characteristics with gambling disorder, including similar dopamine pathway activation. Expert witnesses at the KGM trial have testified about these neurological mechanisms. This is a contested area; platform defendants argue that heavy social media use does not meet the clinical definition of addiction.

Conclusion

Social media addiction litigation is at a pivotal inflection point. The KGM v. Meta & YouTube bellwether trial is the first direct test of whether a jury will hold a major platform liable for design-based claims related to child addiction. The outcomes of this trial, and the federal MDL bellwether cases to follow, will shape the landscape of this litigation for years to come.

Key takeaways from the current state of litigation: plaintiffs have successfully reframed social media harm as a product liability issue, bypassing Section 230 in many courts; TikTok and Snapchat have already settled the first major bellwether claim; state legislatures nationwide are enacting or attempting to enact new safeguards; and more than 41 state attorneys general have taken legal action against the industry.

The science of adolescent digital addiction, the scope of corporate knowledge, and the constitutional limits of state regulation will all be tested as this litigation progresses through 2026 and beyond.

References & Sources

Court Filings & Dockets

•       MDL No. 3047 — In re Social Media Adolescent Addiction/Personal Injury Products Liability Litigation, Case No. 4:22-md-03047-YGR.

•       JCCP 5255 — California Superior Court, Los Angeles County.

•       KGM v. Meta Platforms Inc. & YouTube LLC — Los Angeles Superior Court. Jury selection: January 27, 2026; trial commenced: February 10, 2026.

Government & Regulatory Sources

•       U.S. Surgeon General's Advisory on Social Media and Youth Mental Health (June 2023).

•       U.S. Department of Justice v. TikTok Inc. et al. (August 2024).

•       Federal Trade Commission — COPPA Rule and Enforcement Actions.

•       Congressional testimony records — Senate Judiciary Committee.

Scientific & Medical Sources

•       Cureus (2024): Peer-reviewed article on social media addiction characteristics and dopamine pathways.

•       American Psychological Association — Social Media and Mental Health.

•       Pew Research Center — Teens and Social Media Use.

State Actions & Legislation

•       California SB 976 (Protecting Our Kids from Social Media Addiction Act, 2024):

•       Maryland Online Safety for Minors Act (2025):

Legal News & Reporting

Law360, Reuters Legal, The New York Times, and Bloomberg Law have provided extensive coverage of trial proceedings. These secondary sources should be verified against primary court records prior to publication. Direct quotes from trial testimony should be confirmed against official transcripts.

Content reviewed by legal content team | Last Updated: March 2026 | For informational purposes only — not legal advice.