I don't know about schools anywhere else but around here FB is blocked. I can go online on a teacher's and check my Yahoo mail and see who has posted to my FB but kids can't.
The computers they use are blocked (unless they have found a way around it and that is possible,IMO)
Same here...only tighter restrictions. Teachers are not even able to check our Yahoo mail, FB, blogs, etc. I was surprised that I was able to get onto WS from my work computer after school today.
True on them getting around it, though. I have said forever that they don't need to hire grown men to hack into things -- just get a group of 8th grade boys and they can work around any sort of a block online.