There's a collective action problem here, though. Some parents are willing to do the hard thing and tell their kid no over and over and over. Most aren't. The result is that kids don't hang out in person any more and so the only social outlet left is digital, which makes the decision to ban it at the family level even harder because you may actually do more harm than good by forcing your child to not participate with his friends.

If there's widespread agreement that social media is dangerous and yet widespread difficulty coordinating a response among parents, isn't that exactly what the government is for?