When Ian Russell locked his front door at night, he believed his daughter Molly would be safe upstairs. What the dad did not know was that sinister social media algorithms were bombarding the 14-year-old with endless streams of harmful material in her bedroom. In November 2017, the dark online world would overwhelm Molly and lead her to take her own life. On Thursday, a powerful documentary into her life and death lays out how tech firms’ unstoppable algorithms swamped the vulnerable teen with