I certainly cannot condone evading firewalls and other protections in the workplace or otherwise, since I’m one of those guys trying to stop these people, but these techniques can be useful not only for times when you want it, but also for knowing what people might be doing so that I can stop it. In addition, some of these techniques have the side benefit of being more secure, such as when I am at a hotspot and wanting to make connections privately to public sites.