This is a solvable problem though. FB could create tools to allow their users to cultivate a better experience, including but not limited to parents and children. It wouldn’t require a war of attrition against automation, or infinite moderators, but allowing people to have deeper control of their experience would reduce the number of ads you could shove in their faces and the amount of profit you could make. They therefore won’t do it voluntarily, and that’s why they should be compelled to provide such functionality by law.