I still don't understand why the simplest approach isn't used: ban kids from using the Internet unsupervised. There's really no good reason why a six year old should have internet access.

The argument is that there are parents who are too stupid/lazy to enable parental controls on kids devices and society has a duty to protect kids even if their parents are negligent. Also, kids interact with other kids, so even if you do everything right your kids wind up with access/peer pressure through the kids with bad parents.

I dunno if I agree but I think that's the thrust of it.

it's pretty easy to enforce that for 6 year olds. not as easy for 12 year olds.