Good job not harming the poor guy, he probably bought the stuff from the salesman @ Best Buy or somewherre and doesn't know any better.
Oh, and for all you people with wireless networks out there wanting to see if anyone unauthorized is using your bandwidth, ther is a free program available called airsnare. You can find it @
http://home.comcast.net/~jay.deboer/airsnare/
It will let you send a console message to the unauthorized user telling them whatever message you want and will also automaticaly email you anywhere if someone uses it while you are away