Meta has spent months trying to fix child-safety problems on Instagram and Facebook. But as WSJ's Jeff Horwitz explains, the social media giant is still struggling to prevent its own systems from enabling and promoting a vast network of pedophile accounts. Further Reading: - Meta Is Struggling to Boot Pedophiles Off Facebook and Instagram  - Instagram’s Algorithm Delivers Toxic Video Mix to Adults Who Follow Children  - Instagram Connects Vast Pedophile Network  Further Listening: - He Thought Instagram Was Safe. Then His Daughter Got an Account.  - The Facebook Files, Part 1: The Whitelist  - The Facebook Files, Part 2: 'We Make Body Image Issues Worse'  Learn more about your ad choices. Visit megaphone.fm/adchoices