Alright, rather than pretend to know everything you can do, I'll be frank. If you're offensive, you're outta here. And you know what offensive behavior is. It includes, but is not limited to:
Bad-natured comments
Racism, sexism, classism, religious degradement
Hacking the MUX
Cheating
Powergaming (A biggie.. it's not worse than the others, you just have to be more careful)
Changing yoru character
The last one deserves special note: NO ONE, NOT EVEN A WIZ, CAN CHANGE THE CHARACTER THEY PLAY WITHOUT SUBMITTING A NEW APPLICATION! NEVER!
Just use your judgement. If you don't, we'll be sure to. And when we judge, we do it with @toad at hand. You have been warned.