Quite a few sites require that all chat should be in English, as well. I"ve had two players chatting to each other in the Cyrillic alphabet before, and assumed they were talking about other players" actions. I"ve also had two people sitting next to each other on an online cash table admit in chat that they were sitting next to each other in real life as well, stating "nowhere is it stated that we cannot work together". I report this stuff immediately as a matter of course - it protects me, but, in the long run, it protects everybody else. As we"ve seen with Ultimate Bet and the like, poker players are usually left to check up on the fair play themselves, so I"m all for this thing being stamped on.