I honestly can say I haven't one actual idiot here yet. We're all primarily old-school LWSers, so we know the deal, and we aren't actively trying to seek out building our user base (as far as I am aware, I can't speak for the staff) so I would recommend not bogging the place down with rules. Just keep it as-is and chill, and if people do consistently be annoying, shoot them a PM about it and if it continues just forum ban or all-out ban them if they don't clean up their act after a nice request.
We don't need no rules to know how to rock, they're pretty well understood by everyone here - we aren't noobs.