I've played as a casual risk player on this website since the beginning. It's a fantastic site but recently and increasingly so it seems harder and harder to find a good game.
Most of the games with slots available are two or three guys who play with each other every game. These guys play the same map over and over again and pick on beginners to get their scores up. I'm playing in a doubles game at the moment against two fairly high ranked players and they're very irritating. We were all online at the end of turn 1 and yet they refused to take their turn as that would mean we could also start and gain our Russian bonus (European map). We asked to play real time and they refused saying "you should have ended your turn first".
I have noticed this kind of play more and more these days (the above is just one example). It's not cheating of course but it's still very annoying. The lack of sportsmanship is pathetic really, people are so desperate to win they go to any length to obtain their victory.