Sacanagem

If you abort too often, as a percentage of recently completed games, you lose the ability to abort and all games that start as rated, will be rated.
Also, aborting games do not improve your chances of getting a certain color. The system gives black to the player most due the color, unless it's a direct rematch. If you abort on black and get white on the next game, it is more likely you will get multiple blacks in a row