In a Los Angeles courtroom this week, the spotlight has turned to two of the world’s social media giants—Meta Platforms Inc., owner of Instagram, and Google, parent of YouTube—as they face a landmark trial that could reshape how tech companies interact with young users. At the center of the storm is a 20-year-old woman, identified in court as Kaley or K.G.M., who claims her childhood and teen years were deeply affected by what she describes as a decade-long addiction to social media, specifically Instagram and YouTube.
Kaley’s case is more than just a personal legal battle; it’s the first in a wave of thousands of similar lawsuits targeting not only Meta and Google, but also TikTok and Snap. The latter two companies have already reached confidential settlements with Kaley’s lawyers at the Social Media Victims Law Center in Seattle, leaving Meta and Google to answer in court for their alleged role in what some are calling a youth mental health crisis.
The trial, which began February 10, 2026, has already seen dramatic moments. Kaley herself made a brief appearance before the jury—a panel of six women and six men—before her attorney, Mark Lanier, explained that her fragile mental state made it impossible for her to endure weeks of testimony dissecting her struggles. "Kaley is now easily overwhelmed, and the part of her mind that filters out noise and stress—it was devastated by the defendants’ machine," Lanier told jurors, likening the platforms’ features to a slot machine in a child’s pocket. "Every time she swipes, she’s gambling. Not for money, but for mental stimulation."
The lawsuit alleges that Instagram and YouTube were intentionally engineered to hook children, using features like endless scrolling to keep users engaged and, ultimately, to turn them into lucrative customers. "Imagine a slot machine that fits into your pocket," Lanier said during his opening statement, arguing that the platforms were designed with the developing brains of children in mind, stimulating them to crave rewards and making it difficult to disengage.
Meta and Google, for their part, have forcefully denied any wrongdoing. Paul Schmidt, an attorney representing Meta, acknowledged that Kaley had suffered psychological distress and sought treatment, but he argued that her struggles stemmed from other sources, including family turmoil and bullying at school. "If you took Instagram away, and everything else was the same in Kaley’s life, would her life be completely different or would she still be struggling with the same things she is today?" Schmidt asked the jury, emphasizing that Kaley had undergone more than 260 mental health treatment sessions, with only a handful even mentioning social media.
Schmidt also pointed out that Kaley herself described social media as both a coping mechanism and a creative outlet. According to him, she told company lawyers she was still actively using Instagram, YouTube, and TikTok, and hoped to pursue a career in video editing. "You’ll not see more than twenty of those records that even reference social media, good or bad," Schmidt told the jury. "You’ll see ones that reference other things going on."
On February 11, Instagram’s head, Adam Mosseri, took the stand to defend the platform’s design choices. According to Reuters, Mosseri was questioned about internal company documents and emails from 2019 that discussed whether to lift a ban on photo filters that mimicked plastic surgery effects—a feature some insiders worried could harm teen girls. While some teams at Instagram advocated for keeping the ban in place, Mosseri and Meta CEO Mark Zuckerberg initially preferred to reverse it but limit the filters’ visibility. Ultimately, the company decided to keep the ban, a decision Mosseri said he supported. "I was trying to balance all the different considerations," he testified. "Our policies, like our products, evolve all the time. We try to focus on the most important issues."
He also distanced the company from its early Silicon Valley ethos. "Move fast and break things," the company’s original motto, "is no longer appropriate," Mosseri said, signaling a shift toward more responsibility in product development.
Meta CEO Mark Zuckerberg and YouTube chief Neal Mohan are both expected to testify in the coming weeks, underscoring the high stakes of the trial. The case is being closely watched because it also tests the limits of U.S. laws that protect online platforms from liability for content created by users—a legal shield that has long been a cornerstone of the internet economy. Meta’s lawyers have cited this law in objecting to some evidence, and the company could raise the issue on appeal if it loses at trial.
Kaley’s lawsuit isn’t occurring in a vacuum. According to Bloomberg and Reuters, several parents who believe social media contributed to their children’s deaths were present in the courtroom, highlighting the emotional stakes and public scrutiny surrounding the proceedings. Globally, the issue of children’s access to social media has become a political flashpoint. Australia, for instance, banned social media for children under 16 in late 2025, and countries like Spain, Greece, Britain, and France are considering similar measures.
The trial has also brought to light internal research from Meta, made public by a whistleblower in 2021, that revealed the company’s struggles to control misinformation and acknowledged that Instagram could have negative effects on teenagers, especially girls. In response to mounting criticism, Meta has introduced new features such as teen accounts with content limitations and increased parental oversight. Schmidt highlighted these efforts in court, describing tools that limit user time on apps and respond to problematic usage patterns.
Still, Kaley’s attorneys maintain that these changes are too little, too late. They allege that Meta and Google, in their "quest to make trillions of dollars," knowingly engineered platforms to "trap" children, exploiting their developing brains for profit. "They use the science of the human brain and my experts will liken it to building a Trojan horse," Lanier said, referencing slides showing the companies’ internal documents.
Meta and Google, however, insist that their internal discussions and studies were meant to identify and address problems, not to ignore them. As a Meta spokesperson told Reuters, "the main question in the case is whether Instagram was a substantial factor in the woman’s mental health struggles, and that the evidence will show she faced many significant, difficult challenges well before she ever used social media." YouTube, for its part, also rejected the claims. "Providing young people with a safer, healthier experience has always been core to our work," spokesman José Castañeda said, emphasizing the company’s collaborations with youth, mental health, and parenting experts.
The outcome of this trial could have far-reaching implications. If the jury sides with Kaley, Meta and Google may face pressure to overhaul their platforms and reach settlements in other lawsuits that could total billions of dollars—potentially echoing the massive legal reckonings that transformed the tobacco and opioid industries. At the same time, the trial could force a national conversation about the responsibilities of tech companies and the protections needed for children navigating the digital world.
As testimony continues from top executives and expert witnesses, the eyes of parents, policymakers, and Silicon Valley are all fixed on Los Angeles, waiting to see if this courtroom drama will mark a turning point in the relationship between social media and America’s youth.