This is my desktop at school. The IT lady there has gone absolutely insane with blockers; nearly everything online is blocked (the word "car", bbc.co.uk was for a while, the word "helicopter") she has Windows7 restricted to the classic theme on all of the student's profiles, can't change the desktop background (unless you use their special edition of Firefox), and I can't delete any of the desktop icons I don't use. And she has virtually every proxy blocked, and if it is found out that you got around something, you are suspended from computer usage for a certain amount of time.
And most of the computers are custom built with Core i3's,4GB RAM, and have ATI Radeon HD4350 graphics cards. What a waste of computers.