I saw two girls one cup very early on, along with Isis beheading videos and the fake pain olympics clip. You don't need to be into stuff to be exposed to it on the internet.

With that said, censorship isn't an answer. It's a great way to promote tech literacy and cyber security skills in horny teen boys, but doesn't do much else besides be an excuse to increase the surveillance state at the will of capital.

The only effective solution is terrifying (/s) so I fear that a nanny state may be the only alternative, because otherwise parents have to do the unthinkable: talk to their kids.