My school recently "upgraded" its wi-fi blocking system. A lot of the net radios I listen to are now blocked, but on the upside the forums are now available :D. Only problem is, I can't see images because most of them come from imgur or similar sites.
And yes, I know I could use a proxy but I don't feel like fiddling with it, nor do I want to risk getting into trouble.
So, what about you guys? How efficient is your school/workplace/etc blocking system?