A US federal appeals court has ruled that thousands of lawsuits accusing major social media companies of designing platforms that addict and harm young users can move forward, dealing a significant setback to the industry’s efforts to halt the sprawling litigation.
The decision allows plaintiffs — including children, families, and school districts across the country — to pursue claims that platforms such as Instagram, TikTok, Snapchat, and YouTube deliberately engineered features to maximise engagement at the expense of users’ mental health.
The lawsuits allege that companies including Meta Platforms, TikTok owner ByteDance, Snap, and Google-owned YouTube built products with addictive design elements, from infinite scrolling to algorithmically driven recommendations, while failing to adequately warn about potential harms to minors.
Central to the ruling is the question of whether Section 230 of the Communications Decency Act, a federal law that shields online platforms from liability for content posted by third parties, protects the companies from these particular claims.
The appeals court determined that at least some of the claims focus on the platforms’ own product design decisions rather than on user-generated content, meaning they fall outside the scope of the legal immunity the companies had invoked.
The companies have consistently rejected the allegations, arguing that they have invested heavily in safety tools and parental controls and that their platforms are protected under existing law. They maintain that the design choices at issue are inseparable from the content their services host.
The ruling arrives amid mounting legal pressure on technology firms over data and consumer-protection issues. The sector has faced a wave of court challenges in recent years, ranging from disputes over how user data is collected to antitrust and content-moderation battles playing out in courts worldwide.
The consolidated cases represent one of the largest coordinated legal efforts targeting the social media industry, with plaintiffs seeking damages and changes to how platforms are built and marketed to younger audiences.
The litigation forms part of a broader reckoning over the role of social media in youth mental health, an issue that has drawn scrutiny from regulators, lawmakers, and public health officials in the United States and beyond.
With the appeals court clearing procedural hurdles, the cases are now expected to proceed toward trial, setting up a closely watched legal contest that could reshape how technology companies design and defend their products.