The guys who created this game are a bunch of gay n00b coders, or someone has figured out some serious hacks for it (in which case, they are still n00b coders for not figuring out how to patch the holes).
I just found an account that has NEGATIVE GOLD. That's right: This guy has -37,000 gold right now.
http://www.kingsofchaos.com/viewprofile.php?id=674908
It will probably change by the time you see it, though.