A federal trial began Tuesday in California accusing Meta Platforms Inc. of deliberately designing Instagram and Facebook to addict children and teens [1].

The case represents one of the most significant legal challenges to social media business models. It seeks to hold the company accountable for the mental health of millions of minors and could set a precedent for how platforms are regulated in the U.S.

Opening arguments commenced on Aug. 13 in the U.S. District Court in San Francisco [2]. A coalition of 29 states [1] said that Meta built addictive features specifically for minors while knowing these designs would cause anxiety, depression, and eating disorders [3]. The lawsuit further said that the company downplayed these harms in public statements to protect its business interests [1].

Meta is the owner of both Instagram and Facebook. The states said that the company's internal knowledge of these risks contradicts its public image as a safe environment for young users [1]. This federal trial is part of a larger legal onslaught against the tech giant, which currently faces thousands of related lawsuits over child safety [2].

The plaintiffs seek damages and structural changes to how Meta operates its platforms for young users. The trial will examine whether Meta's engineering choices constitute a deliberate effort to keep children engaged at the expense of their psychological well-being [3].

Meta has previously defended its practices, though the specific legal arguments for this trial are being presented in the California federal court [2]. The proceedings will focus on the gap between the company's internal data and its public claims regarding the safety of its algorithms [1].

A coalition of 29 states alleges that Meta built addictive features specifically for minors.

This trial marks a shift from individual personal injury lawsuits to a coordinated government effort to challenge the 'attention economy.' If the 29 states prevail, it could force a fundamental redesign of social media algorithms for minors and open the door for stricter federal oversight of platform design and child safety disclosures.