Guidlines?
All people need to remember is:
If they dont like flame wars, dont start them and dont participate with them.
If you have a beef with a user, PM him, dont argue a point or put your point accross and use offensive language in the forum. Send a person a PM instead. Aruge there.
Moderators: if you notice a potential flamewar, delete comments, or if its too late, freeze the threed.
Generaly, if i see someone being a dickhead during the conversationg and i feel the need to say something, i'll PM him so i dont get the rest of the thread involved. But even more generaly, i'll just try to forget it and think, its just a stupid forum. Get over it!
I dont know Guidelines are needed, just some simple common sence and for one to think about their actions and what those actions could bring about!!!