A federal appeals court dealt a major blow to the social media industry on Monday, ruling that Meta, Google, TikTok, Snap and other platforms must face more than 3,000 lawsuits alleging they designed their products to be addictive to children, according to NBC News and Axios.

The 9th U.S. Circuit Court of Appeals rejected an attempt by Meta and TikTok to have the litigation thrown out on the grounds that Section 230 of the Communications Decency Act — the 1996 law that shields platforms from liability over user-posted content — also protects them from claims that they failed to warn the public about addictive design features. The court disagreed, ruling that Section 230 offers companies a defense at trial, not blanket immunity from being sued in the first place, and that the appeal itself was premature.

The ruling is the latest development in a wave of litigation that began building in 2022, as families and school districts across the country blamed social media companies for a rise in teen anxiety, depression and self-harm. Similar claims have already pushed platforms to introduce nighttime screen-time limits and parental controls, though plaintiffs argue those changes came only after mounting legal and regulatory pressure, not out of genuine concern for user welfare.

What the Lawsuits Allege

The consolidated cases, overseen by U.S. District Judge Yvonne Gonzalez Rogers in Oakland, accuse the platforms of engineering features like infinite scroll, algorithmic recommendation feeds and push notifications specifically to maximize engagement among minors, allegedly at the expense of their mental health. Plaintiffs include school districts, individual families and — most consequentially — a coalition of 29 state attorneys general who separately allege Meta illegally collected children's data and misled the public about platform safety.

SECTION 230 IS A DEFENSE, NOT IMMUNITY

The ruling clears the way for a closely watched trial that opened this week in Oakland federal court, where the state attorneys general are seeking to prove Meta knowingly built Instagram and Facebook features to be habit-forming for teenagers. The court separately denied Meta's request to delay that trial, according to U.S. News' account of the ruling.

Industry Reaction and the Road Ahead

Meta and TikTok have both signaled they intend to keep fighting the underlying claims even as the procedural appeal fails, arguing that product design decisions are protected choices, not deceptive conduct. Legal analysts say the ruling — one of the most significant tests yet of Section 230's limits — could expose the platforms to billions of dollars in potential damages and force design changes to youth-facing features well beyond the plaintiffs named in the case. Additional trial dates in the consolidated litigation are expected to be scheduled over the coming months.