That was done on the school computers in middle school. Nobody really cares in high school; there's an Internet filter, but the only sites I've found it blocks are Facebook and (oddly) The A.V. Club. Facebook I don't mind, since I have notifications sent to a folder in my email inbox anyway, but not being able to access The A.V. Club when I'm at school and have nothing to do can be annoying.
Wow, San Jose is pretty lax. We can't access anything remotely entertaining. Hell, even this forum was blocked.
Ours is kind of in the middle; the big social network/entertainment/(I assume) pornographic sites are blocked, but they didn't bother to purge all the way down here.