A landmark federal trial opened in Oakland on August 19, 2026, with a bipartisan coalition of 29 US states formally accusing Meta Platforms of deliberately designing Facebook and Instagram to addict children. Mark Zuckerberg, along with Instagram chief Adam Mosseri, is expected to testify during the six-week proceedings. Analysts have described it as the most significant legal challenge yet over social media’s impact on youth mental health.
What is the Meta Child Addiction Trial About?
The 29 states, led by California, Colorado, Kentucky, and New Jersey, accuse Meta of designing its platforms to hook young users, fueling anxiety, depression, and suicide among children and teenagers. All 29 states also accuse Meta of violating federal law by improperly collecting and using children’s personal data.
This is a coordinated legal action from nearly three-fifths of US states, reflecting years of accumulated public concern, internal whistleblower testimony, and documented harm claims from families across the country.
What Did the Prosecution Argue in Opening Statements?
California Deputy Attorney General Megan O’Neill told the eight-person jury that Meta’s business model was to “hook the users, hold them for as long as they can, harvest their data, and then hide the truth from the public.” She said this worked “especially well for kids.”
O’Neill pointed to an internal email sent to Instagram chief Adam Mosseri in which “teen time spent” was described as the goal. She said employees internally referred to Instagram as a “drug” and viewed themselves as “pushers.”
“Meta found the younger a kid is when they start using the app, the better,” O’Neill told the jury.
The states are seeking structural changes to both platforms, including eliminating the likes feature, removing infinite scroll, setting time limits for younger users, and enforcing restrictions to keep children under 13 offline.
How Did Meta Respond to the Allegations?
Meta’s lawyer Paul Schmidt countered that while some users face struggles, research shows no clear link between adolescent social media use and a lack of wellbeing. He said Zuckerberg shared the desire to improve services rather than make them dangerous, and acknowledged that employees might use “loose” language in private communications, but maintained the products were not addictive.
“They don’t believe they’re going to do well if people don’t like their service,” Schmidt said.
Meta has consistently denied that its platforms were designed to harm children. The company argues that correlation between social media use and adolescent mental health struggles does not establish causation.
What are the Financial Stakes for Meta?
Meta stated that potential civil penalties in the case could reach $1.4 trillion, close to the company’s entire market value. State attorneys general argued at a hearing last week that the more realistic figure is closer to $200 billion, roughly three years of after-tax profit for Meta.
Following the trial’s opening on Tuesday, Meta shares closed down 4.4% at $543.67.
Even at the lower estimate of $200 billion, the financial exposure is material. The reputational exposure, Zuckerberg testifying under oath about what Meta knew and when, may ultimately carry more weight.
Who is Testifying Against Meta?
Former Meta safety engineer Arturo Bejar testified as the states’ first witness. Bejar has long maintained that Meta knew its child safety tools did not work and has testified against the company in four trials. Meta attempted to block his testimony over deleted Signal messages with former employees, but US District Judge Yvonne Gonzalez Rogers rejected that effort.
Bejar told jurors that “move fast and break things” was a mantra at Meta, which took a “don’t ask, don’t tell” approach to monitoring whether children under 13 were on the platform. “Many products were shipped into the world,” including Reels short-form videos, “and safety was not a consideration in how it was initially deployed,” he said.
Zuckerberg and Mosseri are both expected to testify. The eight-person jury will issue an advisory verdict, but Judge Rogers will determine Meta’s final liability.
What Legal Precedents Already Exist Against Meta?
This trial does not exist in isolation. A pattern of legal losses has been building.
In March, a Los Angeles jury ordered Meta and Google to pay $6 million to a 20-year-old woman who said she became addicted to Instagram and YouTube as a child. Earlier this month, a New Mexico judge ordered Meta to pay $567 million to address teenage mental health. Tennessee’s attorney general is also suing Meta in Nashville over similar claims.
The lawsuit began in 2023, two years after whistleblower Frances Haugen told a US Senate committee that Meta knew its products were unsafe for children but did nothing, prioritizing higher profits instead.
What Do Affected Families Want from This Trial?
Outside the Oakland courthouse, families of children harmed by social media platforms gathered as the trial began.
Mary Rodee said her 15-year-old son Riley Basford died by suicide in 2021 after being victimised by a predator on Facebook. “They call it spontaneous suicide. I call it what it was, the predictable outcome of a system that protects corporations instead of children,” she said.
For families like hers, the financial penalties are secondary. The structural changes the states are demanding, time limits, elimination of infinite scroll, stricter age enforcement, are the outcomes that matter most.
FAQs
What is the Meta child addiction trial?
A federal trial in Oakland in which 29 US states are suing Meta Platforms over allegations that Facebook and Instagram were deliberately designed to addict children, drive anxiety and depression, and illegally collect minors’ personal data.
Will Mark Zuckerberg testify at the trial?
Yes. Zuckerberg and Instagram chief Adam Mosseri are both expected to testify during the six-week trial. Former safety engineer Arturo Bejar testified first as the states’ opening witness.
How much could Meta pay in penalties?
State attorneys general estimate penalties closer to $200 billion. Meta itself has acknowledged potential exposure as high as $1.4 trillion, though the final figure will be determined by Judge Yvonne Gonzalez Rogers.
What changes are the states demanding from Meta?
The coalition is seeking the elimination of the likes feature, removal of infinite scroll, mandatory time limits for younger users, and stricter enforcement to prevent children under 13 from accessing Facebook and Instagram.
How has Meta responded to the child addiction allegations?
Meta denies its platforms were designed to harm children. Its legal team argues there is no clear research link between adolescent social media use and reduced wellbeing, and that internal employee language describing products as addictive reflects informal communication rather than company intent.
