Since Monday morning, a Los Angeles courtroom has become ground zero in a legal battle that could reshape how social media companies treat their youngest users. The civil trial pits a young plaintiff from Chico, California, against tech giants Instagram and YouTube, with billions of dollars potentially at stake and rules governing children’s online safety hanging in the balance.
A Los Angeles courtroom has become ground zero in a legal battle that could reshape how social media companies treat their youngest users.
The lawsuit centers on a straightforward but explosive claim: these platforms were deliberately designed to hook young children, even though their creators knew the products could cause harm. Plaintiff Kaley G.M. alleges her addiction began in grade school and led to serious consequences, including bullying in high school and receiving unwanted explicit images from adults. Her legal team argues that the companies understood the dangers yet aggressively marketed their platforms to minors anyway. Researchers and industry insiders have warned that strategy effectiveness decay can make harmful product design more impactful over time.
Four hours of opening arguments kicked off the proceedings Monday in Los Angeles County Superior Court. The case is notable because it separates company design choices from harm caused by other users. Rather than blaming bullies or predators alone, the lawsuit targets the fundamental way these platforms were built and marketed.
Instagram CEO Adam Mosseri took the witness stand during the plaintiff’s case, a risky move that underscores the trial’s significance. When questioned about excessive Instagram use, Mosseri characterized addiction as personal and individual. Internal emails from 2019 revealed company discussions about beauty filters that mimic plastic surgery, which lawyers say damaged young users’ self-image. Meta CEO Mark Zuckerberg is scheduled to testify later this month.
The defense maintains that YouTube isn’t technically social media and that addiction standards don’t apply to video platforms. They also argue that removing these apps wouldn’t eliminate all struggles in the plaintiff’s life, pointing to other contributing factors like bullying. The trial is being closely watched as a bellwether among thousands of similar lawsuits pending in state and federal courts across the country.
Legal experts agree the plaintiff faces a high bar proving causation, but a victory could establish a baseline value for similar lawsuits nationwide. The verdict may ultimately determine whether tech companies can be held liable for products they knew were dangerous to children yet pushed to them anyway.




