Since the software that tracks bandwidth usage by person is software based, it would be advantageous of cubical bound people to examine
this article on Mojopack which basically allows you to transport a desktop environment on a USB device.
Always good to keep your non-work related surfing off of company computers to begin with, this software appears to store all the temporary image files, history, etc, of your browsing (or application/games) on the USB device, leaving your work computer nicely clean.