How about if the admin filter some keywords(foul words), such that when you use them, you will be handed ban. Such as 7days ban, few days signature ban, read only mode etc. This will promote peaceful co-existence and curtail to the barest minimum any form of bullying, unfriendliness, acrimony or as the case may be.
There is unofficial rule against trolling.
3. No trolling.
But it does not lead to instant ban on a forum user after a trolling post. You can report trolling posts and help to erase them in the forum but to hope that the user will get a ban which is either temporary or permanent, is not easily reaching target.
Usually ban hammer is very softly used for trolling violations.