OK, I think you lot need some blanks filling in.
I work as a Tech in schools in a county in England. I won't say which county, suffice to say we blocked Sparklebox on 5th January 2010.
Why wasn't it blockwed sooner ? Because there was an ongoing court case, and it could have jeopardised the case had it been blocked sooner, and my understanding is that the Police asked schools not to block so that attention was not drawn to the case. Remember a man is innocent until proven guilty.
Why is it blocked you are asking, when it is just a site that provides links to other sites, and contains only educational resources ? How about BECAUSE THIS MAN MAKES MONEY FROM THIS SITE, AND IT IS THAT MONEY THAT FEEDS HIS FILTHY HABIT. So you say he only looked at these pictures. That is still too much, because people like him are the market for this filth, and if there was no market for it, there would be none of it.
That is reason enough to block his sites. Don't you see the irony, that he uses a website aimed at teaching primary school children, so that he can look at primary school children ?