An anonymous reader quotes a report from Ars Technica: This week, the first high-profile lawsuit -- considered a "bellwether" case that could set meaningful precedent in the hundreds of other complaints -- goes to trial. That lawsuit documents the case of a 19-year-old, K.G.M, who hopes the jury will agree that Meta and YouTube caused psychological harm by designing features like infinite scroll and autoplay to push her down a path that she alleged triggered depression, anxiety, self-harm, and suicidality. TikTok and Snapchat were also targeted by the lawsuit, but both have settled. The Snapchat settlement came last week, while TikTok settled on Tuesday just hours before the trial started, Bloomberg reported. For now, YouTube and Meta remain in the fight. K.G.M. allegedly started watching YouTube when she was 6 years old and joined Instagram by age 11. She's fighting to claim untold damages -- including potentially punitive damages -- to help her family recoup losses from her pain and suffering and to punish social media companies and deter them from promoting harmful features to kids. She also wants the court to require prominent safety warnings on platforms to help parents be aware of the risks. [...] To win, K.G.M.'s lawyers will need to "parcel out" how much harm is attributed to each platform, due to design features, not the content that was targeted to K.G.M., Clay Calvert, a technology policy expert and senior fellow at a think tank called the American Enterprise Institute, wrote. Internet law expert Eric Goldman told The Washington Post that detailing those harms will likely be K.G.M.'s biggest struggle, since social media addiction has yet to be legally recognized, and tracing who caused what harms may not be straightforward. However, Matthew Bergman, founder of the Social Media Victims Law Center and one of K.G.M.'s lawyers, told the Post that K.G.M. is prepared to put up this fight. "She is going to be able to explain in a very real sense what social media did to her over the course of her life and how in so many ways it robbed her of her childhood and her adolescence," Bergman said. The research is unclear on whether social media is harmful for kids or whether social media addiction exists, Tamar Mendelson, a professor at Johns Hopkins Bloomberg School of Public Health, told the Post. And so far, research only shows a correlation between Internet use and mental health, Mendelson noted, which could doom K.G.M.'s case and others.' However, social media companies' internal research might concern a jury, Bergman told the Post. On Monday, the Tech Oversight Project, a nonprofit working to rein in Big Tech, published a report analyzing recently unsealed documents in K.G.M.'s case that supposedly provide "smoking-gun evidence" that platforms "purposefully designed their social media products to addict children and teens with no regard for known harms to their wellbeing" -- while putting increased engagement from young users at the center of their business models. Most of the unsealed documents came from Meta. An internal email shows Mark Zuckerberg decided Meta's top strategic priority was getting teens "locked in" to Meta's family of apps. Another damning document discusses allowing "tweens" to use a private mode inspired by fake Instagram accounts ("finstas"). The same document includes an admission that internal data showed Facebook use correlated with lower well-being. Internal communications showed Meta seemingly bragging that "teens can't switch off from Instagram even if they want to" and an employee declaring, "oh my gosh yall IG is a drug," likening all social media platforms to "pushers."

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