Just so that everyone is clear of what will get you forum banned these days:

1) Writing "clear fake war" in a thread
2) Using the word twat (unclear if it's for language or the fact someone was called a twat).

Things that are currently frowned upon, but not ban worthy (yet):

1) Disagreeing with a mod
2) Informing a mod they are doing a bad job
3) General complaining

I will edit this list as I get more feedback