A major court case has just begun, designed to examine whether social media platforms are intentionally designed to keep children engaged in harmful ways. A young woman, ‘Kaley’, alleges that after she began using Meta and WhatsApp as a child, she developed anxiety, distorted body image, and suicidal thoughts after prolonged exposure. Company leaders argue they implemented safety measures and relied on research showing mixed evidence about mental health harm. Parents, however, say their children were exploited through addictive features and inadequate age protections. The trial, which started by cross-examining Mark Zuckerberg, might influence hundreds of similar cases and could force changes to how social media platforms operate. The debate raises broader concerns about technology, profit, responsibility, and the wellbeing of young people growing up online.