@ Victorious
On the one hand I also got screwed a few times, when I didn't get back my points and someone else did, who was not cheating. Just think about games, where someone doesn't make the first move, otherones benefit. Statistically these cases get into balance.
On the otherhand, the name of the game is Diplomacy. Protecting my interests inside the game, and outside (for eg. on this forum) is considered part of the game for me. I can live with the results, I have played really fair in some cases (drawing at 17SCs with clear win situation, drawing early at NMRs) and I haven't played that fair in some other cases, probably in yours.
But guess what, that's part of the game. As it is also part, that cancelling past games is difficult, and that's also part someone has to quit because of private reasons and screws many others' games. It's life, and I do not consider these as cheating, but I admit it's not fair. There's a well defined line between cheating and fair play. And that line is written down in the rules.
If someone is able to get back his points, good for him. He was diploming well with the mods, or with the other players to reach cancel. There's no Big Brother around and won't be. If our game bothers you, I'm sorry, I played by the rules, I won by the rules, I sleep well, I would do the same again. You can be mad at me, you can be angry, irked, whatever, but I suggest you to move on and just start your next game.