Bumped onto this tutorial yesterday on random. You might be interested if you are finding ways how to bypass blocked websites without using proxies.
This technique uses hex as a alternative representation to text. It seems to work nicely in this tutorial but I haven’t try it out personally.
Unblock Webpages Without A Proxy - video powered by Metacafe
You can get a online text to hex converter here.
I also never use a web proxy to bypass web filters because I have Hotspot Shield free VPN. Just Download >> Install & Click Connect >> Now access any blocked site