TheRealMafoo on 15 November 2009
Check your connection log. You should have one, and record what the MAC address of the PC is that's connecting wirelessly. Take a screenshot too.
MAC addresses (while they can be spoofed), as physical addresses in your network card. If you can prove it's not yours, or better yet, find the network card it belongs too, it might help.
By the way, unprotected wireless in a University, means you probably have 5-10 people using it.
