Nica, they block almost everything at school. It doesnt matter if it is nudity, if want to they can. They dont really want you to spend your time inside all day, searching on sites or watching vids from Youtube. E.g. at my school, all gaming, video, email etc. sites have been blocked from student access simply to keep numbers using the Computer labs down. Also we have a 100GB bandwith, which would easily be run over if people were continously watching vids every month, and that's not to mention what teachers do in their time!!