WEP Hacking

How do I hack my neighbors network? I want revenge for the kid who decided to destroy my open network by making me go over my bandwidth limit. Yes I know my own network should had been encrypted with WPA but I share my internet with the people across my home. The kid who live next door downloaded some shit load of torrents I predict.

uh i think knoppix STD had a program that would sniff a network for a day or two and come up with the password.