Why does your kid have a computer, ipad, ipod, and cellphone? More specifically, why do you continue to let him have them after he's repeatedly rebelled against you? Have you tried selling all of them and disconnecting the internet from your house, then reintroducing them when he's learned to behave?
Parenting is only affective when you're consistent.
The point you disagree with them on is that society should bend over backwards to accommodate children rather than leaving it up to parents to explain adult things to their kids. If kids don't have decent parents, they have bigger problems than seeing tits.
Therein lies the irony since these are the kids that grow up to be the perverts.
The finest eloquence is that which gets things done.