Mark Zuckerberg will face grieving families again as social media addiction trial opens in Los Angeles

Mark Zuckerberg

• Mark Zuckerberg to testify in LA social media addiction trial
• Families allege Instagram and YouTube harm teens' mental health
• Meta defends teen safety measures amid 1,500+ lawsuits

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Meta CEO Mark Zuckerberg will take the witness stand this week in a closely watched social media addiction trial in Los Angeles, bringing grieving families face to face with the tech executive once again.

The lawsuit, filed by a young woman identified as Kaley and her mother, accuses Instagram and YouTube of intentionally designing features that encouraged compulsive use and harmed teenagers’ mental health. It is the first of more than 1,500 similar cases against major social platforms to reach trial.

Parents who previously confronted Zuckerberg during US congressional hearings in 2024 are traveling from across the country to attend the proceedings.

Families return after congressional apology

According to the report by CNN, Several families in the courtroom say they believed change would follow Zuckerberg’s public apology to parents whose children died after alleged social media-related harms.

Instead, they argue that unsafe content, online bullying, and digital exploitation continue to affect young users.

One parent, Joann Bogard, whose 15-year-old son died after attempting an online video challenge she says he discovered on YouTube, has become a vocal online safety advocate. Her earlier lawsuit was dismissed under legal protections for online platforms, but she is appealing while supporting the current trial.

Families say the case is about forcing accountability for design choices they believe prioritize engagement over safety.

Meta defends its youth safety measures

Meta Platforms has denied the allegations, stating that it has invested heavily in teen safety over the past year.

Following earlier criticism, the company introduced teen accounts with default privacy settings, content restrictions, and parental oversight tools. Meta argues these features have reduced exposure to sensitive material and limited overnight screen time.

Company representatives maintain that responsibility is shared with families and that extensive tools already exist for supervision.

Plaintiffs’ lawyers, however, point to internal documents suggesting younger users remain a valuable long-term growth group for social platforms.

What testimony may focus on

Zuckerberg’s appearance follows testimony from Instagram chief Adam Mosseri, who told the court that social media is not clinically addictive but can become problematic for some teens.

Mosseri also stated that teenagers generate less revenue than other user groups — a claim being challenged by lawyers using internal research.

Legal analysts say Zuckerberg is expected to highlight Meta’s safety initiatives and personal concern as a parent, while the jury will ultimately decide whether the company’s efforts were sufficient.

If the jury rules in favor of Kaley, it could weaken long-standing legal shields that have protected social media companies from liability over platform design.

Beyond potential damages running into billions of dollars, the outcome could force changes in how digital platforms structure algorithms, notifications, and engagement tools.

Hundreds of additional lawsuits from parents, schools, and state governments are already lined up, drawing comparisons to past public health litigation that reshaped industry practices.

For families attending the trial, the goal is clear: to ensure the impact of social media on children is finally addressed inside a courtroom, not just in congressional hearings.