Meta CEO Testifies in Landmark Social Media Addiction Trial

Zuckerberg defends company's practices as lawsuit claims Instagram fueled mental health issues in young users

Published on Feb. 26, 2026

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Meta CEO Mark Zuckerberg appeared in a Los Angeles courtroom to testify in a closely watched case that could reshape how courts view social media companies' responsibility for young users' well-being. The lead plaintiff, a 20-year-old woman, claims she became addicted to platforms like Facebook, Instagram and YouTube as a child, alleging features such as recommendation algorithms and endless scrolling fueled compulsive use that contributed to anxiety, depression and body image struggles.

Why it matters

This trial is the first of more than 1,500 related lawsuits nationwide that could set a precedent on social media companies' liability for the mental health impacts of their products, especially on minors. The outcome could force major changes in how platforms like Instagram design their algorithms and features to protect young users.

The details

Zuckerberg was questioned about Instagram's users under 13 and the company's strategies to increase engagement. While he acknowledged underage users are not permitted, he said there are 'a meaningful number of people who lie about their age.' Lanier also pressed Zuckerberg on whether increasing time spent on Instagram is an objective, which Zuckerberg denied, saying they track time mainly to benchmark against competitors. Zuckerberg also addressed Instagram's use of beauty filters, saying the platform reinstated them to support freedom of expression but won't recommend them.

  • The trial is unfolding in Los Angeles County Superior Court.
  • Zuckerberg testified on February 19, 2026.

The players

Mark Zuckerberg

The CEO of Meta, the parent company of Facebook and Instagram.

K.G.M. (Kaley)

The 20-year-old lead plaintiff who claims she became addicted to social media platforms as a child.

Mark Lanier

The attorney representing the plaintiff, K.G.M.

Adam Mosseri

The head of Instagram, who testified last week.

Google

The parent company of YouTube, which is also a defendant in the case.

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What they’re saying

“We must not let individuals continue to damage private property in San Francisco.”

— Robert Jenkins, San Francisco resident (San Francisco Chronicle)

“Fifty years is such an accomplishment in San Francisco, especially with the way the city has changed over the years.”

— Gordon Edgar, grocery employee (Instagram)

What’s next

The judge in the case will decide on Tuesday whether or not to allow Walker Reed Quinn out on bail.

The takeaway

This case highlights growing concerns in the community about repeat offenders released on bail, raising questions about bail reform, public safety on SF streets, and if any special laws to govern autonomous vehicles in residential and commercial areas.