Meta YouTube addiction verdict sees US jury hold tech giants liable for harmful platform design, in a landmark decision reshaping industry accountability
A California jury has delivered a landmark verdict against Meta Platforms and YouTube, finding that key platform design features contributed to harm suffered by a young user, in a decision poised to transform the legal landscape for the technology industry.
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The ruling, reached after more than 40 hours of deliberation across nine days, marks the first time a jury has held major social media platforms legally responsible for features alleged to be deliberately addictive.
The case, known as K.G.M. v. Meta & YouTube, centred on claims that the companies engineered products to maximise user engagement at the expense of children’s mental health.
The lawsuit was brought by a 20-year-old woman, identified as Kaley, who testified that she began using YouTube at the age of six before joining Instagram at nine.
She told jurors that prolonged use of the platforms fuelled depression, anxiety and severe emotional distress during her childhood.
Lawyers for the claimant argued that features such as infinite scrolling, autoplay and push notifications were intentionally designed to keep young users engaged.
The legal team, led by trial attorney Mark Lanier, framed the platforms as highly compelling digital environments that exploited the vulnerabilities of minors.
Unlike previous cases that faltered under Section 230 of the Communications Decency Act, the plaintiffs focused on product design rather than user-generated content, allowing the case to proceed under product liability principles.
Jurors were instructed to determine whether the companies knew or should have known about the risks and whether their design choices were a substantial factor in causing harm.
The trial featured testimony from Mark Zuckerberg and Adam Mosseri, who answered questions about internal platform mechanisms.
Documents presented in court reportedly showed internal comparisons between user engagement patterns and addictive behaviour, adding weight to the claimant’s arguments.
Defence lawyers for Meta rejected the claims, attributing Kaley’s struggles to personal circumstances and highlighting the company’s safety tools and parental controls.
YouTube, meanwhile, argued that its service functions more like traditional television and presented usage data suggesting limited engagement with certain features.
The verdict follows closely on the heels of a separate decision in New Mexico, where another jury found Meta Platforms liable for harm to children’s mental health and imposed a penalty of $375 million over deceptive practices linked to platform safety.
The company has indicated it will appeal that ruling.
Legal experts say the Meta YouTube addiction verdict could set a powerful precedent for thousands of similar lawsuits pending across the United States, including actions brought by families, school districts and state authorities.
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The decision is widely seen as a decisive moment that could force sweeping changes in how social media platforms are designed, regulated and held accountable.
