KamuiKachi (Camel-man), Desertninja, KBoogi(Booger) and Varu are some of the most active mods (so don't do anything around them >.>).
Baluski and Neji are the big guys around here. If they say do something, do it, since they probably don't have to go through the banning paperwork.
There are also Game Masters who... um, do something. If someone knows the details, tell him.
There are also other mods (ie. Lebis, Kurisu, Xaos, Atomkai, sycic), so listen to them too.
Also, try to treat everyone with respect. If someone REALLY does something wrong, call a moderator, and they will ban, mute, or do something.