That really sucks.

The computers at the school I go to don't care what you do on the internet... well, actually, they do, you are only supposed to use it for school purposed, but a little deleting of history, and you are A-OK at me school. ;)

Really though, that must suck if they block these places on your computers. I don't normally go on any of them though since I'm usually busy doing assignments during that class...