Child sex abuse and the sharing of images of child sex abuse (its not porn is it – ‘porn’ tends to indicate a willingness to participate) was happening long before the Internet came about. Sticking some crappy filters blocking porn sites unless you opt in isn’t going to reduce the number of cases of child sex abuse, sex abuse circles are very sophisticated and a lot of them pretty well structured, they know what they are after and where to get it through whatever means they have available. Similarly stopping adults or children accessing porn won’t stop child sex abuse, people who abuse children generally don’t do it because of a porn addiction and you couldn’t generalise that children exposed to porn at a you g age will grow up to abuse. They might have some warped ideas about what sex really is but their overall life experiences will make them abusers, not accidentally accessing porn on the net a few times as youngsters.
Throwing a load of filters at something like the Internet is pointless. Awareness raising and improved support channels for victims would be a much more productive approach.
As an aside, I just tried to search for ‘porn filter articles’ on yahoo search and it told me I was a sex pest and could get stuffed. Well, it told me I was searching for ‘sensitive’ material and so it had been blocked. Meh.