1.WarLight's normal rules apply to the forum, such as being respectful to other players at all times, not spamming, not impersonating other players, etc.
2.Don't use the forum for reporting other players breaking the rules. You should report them by using the in-game Report button.
3.Don't bump a thread just for the sake of bumping. Posting a message just containing "bump" will just be deleted. If you have a valid reason to bump a thread, explain what it is.
4.Don't re-create locked threads. The point of locking a thread is to end the discussion since it wasn't appropriate for the forum. Threads that try to circumvent a lock by creating a new thread to continue the discussion will find their threads deleted.
5.Don't use obnoxious subject lines, such as all-caps or excessive length.
6.Don't spam links to third-party sites.
Those rules are broken on a daily, if not (bi)hourly basis. In my opinion there is a clear need for some more moderation. Fizzer has always been lenient, but I am afraid some players have taken too much advantage of that.