I consider it a fun challenge to work around the obstacles that are in place. I also use a private tunnel to get around all the web filters and etc.

Last time I ran into problems with web filters at work, it was because they had blocked a lot of security-related things on the grounds that they could potentially be useful to hackers. For example, the websites for most popular fuzzers were blocked.

A specific case I recall was being able to access Sourceforge.