In a London court this week, coroner Andrew Walker had the difficult task of assessing a question that child safety advocates have been asking for years: How responsible is social media for the content algorithms feed to minors? The case before Walker involved a 14-year-old named Molly Russell, who took her life in 2017 after she viewed thousands of posts on platforms like Instagram and Pinterest promoting self-harm. At one point during the inquest, Walker described the content that Russell liked or saved in the days ahead of her death as so disturbing, the coroner said in court, that he found it “almost impossible to watch.”