Well at my school it was as simple as using a proxy to get around the web blocker. Until they figured out how to prevent people from entering proxies like 3 years later, it was a sinch. I just ran my own proxy server at home so I could pretty much use my IP at school as a proxy and bypass the filters. Only me and a very select few of my friends used it though, which was great because most proxies are horribly slow, but since mine was running off my home connection it was nice and speedy even with 3-4 people using it at once.