Basic rules as follows
-No swearing, and I mean it.
-No Spam, (anything off topic of this forum no matter how funny)
-No naked people
-No Flaming, attack problems not people
-No outrageous signatures, keep them a decent size.

I think if there were an off-topic section with some heated arguments going on it would keep this site alive. (We'd be checking the forum more often, and maybe see game-related posts which we would check too)
Maybe after 2000 posts on the off-topic it would be deleted or something?