Rule 9 says:
I know it's tough to regulate when you're concentrating on playing, but I was wondering if these players would ever get kicked. I'm sure you don't want to kick anyone unnecessarily, but I think most people would understand.(9) No long term spec'ing or AFK ( If you have to do something quick, fine, like a 10 min max and letting an admin know is in your best interest ) If you are not playing , leave so someone can come in. The servers are for players not spectators.
Anyway, this was just a thought. If it really doesn't have an effect I'll refocus my efforts on whining about high pingers who play ;) jk.