graeme_p - 3:20 pm on Jul 25, 2013 (gmt 0)
@BeeDeeDubbleU, how would opt-in filtering help with that? All it would need is for some parents to opt-out, or for some kids to work out how to bypass the filters, and they could still download and show it do their friends.
They could also rip a DVD and put in on their phone, or scan photos and put them on their phones.
The only way to guarantee kids never see #*$! would be to ban it altogether, in any medium, not just the internet, and enforce the bad rigorously.
As far as the bookshops go, the last time I saw de Sade in a bookshop it was an ordinary high street bookshop and on the general fiction shelves to which children had access.