Fake signatures is something that may get you into trouble too. Lot's of people post one liners and add a link to their site manually because they can edit a real signature (you will not have one until you are around here for 90 days)
This will not get you banned straight away but it can get you into trouble or may re-inforce the impression that banning you could be a good thing.
As everyone else said, treat the forum as a forum (that is, aks and answer questions, debate, have fun and learn) and not as article exposing software (again, don't create threads to expose how much you know... it is better to solve real problems), be good and everything will go just fine. And you will even have fun!