I've seen the guideline for the Bug Reports part of the forum and found it pretty neat. It gives a whole sense of organization. I believe that having some kind of Guideline explaining some basic rules wouldn't hurt at all, and could even avoid some future problems. And yes, the folks from this forum seem to very polite and I haven't seen any unspoken rules being broke, at least for now.
If I have any question, I'll surely ask!
Anyway, as they say, it is better to buy a plunger before you need one. Maybe that saying works for forum guidelines too! Who knows?