> The parents job is to keep their kids out of trouble. Learning how to keep track of what their kids access shouldn't be difficult

Unfortunately it is, but we could fix that with only minimally invasive legislation. Right now you either whitelist which breaks half the internet on a recurring basis (things are constantly changing) or you blacklist which is swiss cheese. Either way you're relying on third parties.

I think it would be much better to legally mandate a certain minimum level of self classification for website operators along with a simple and extensible scheme for communicating such. It might also be useful to mandate that devices ship from the OEM with parental control software supporting that standard but honestly I doubt that's necessary - if their were a standardized and above all reliable signal available I think browsers and operating systems would rapidly adopt support for it.