I've always thought... (Score 1)

That all the porn sites should be on .sex
That way, if parents really wanted to keep their kids out of porn sites, all they would have to do would be block the .sex TLD, and it wouldn't be infringing on anyone else's rights to view porn, in fact it would enhance it, since you would be able to type in anything.sex and get what you were looking for.
Plus, it's conveniently 3 letters.

If at first you don't succeed, then skydiving is not for you.