Communal Graffiti

http://www.i-am-bored.com/bored_link.cfm?link_id=26278
i don't know if it really works i haven't tried it yet but the video makes it look like it does.

theres many hacks like this, and yes they do work, but can be kinda complex at times.
easier to just go rack a coke.
or steal someones wallet haha