but I'd be cautious to let you re-rate something more than +/- only a few points, like +/- 2 points, and only let you re-rate one time. We'd hate for a game to start dropping from a 9.something average to a 2.something average because people got bored.
Well, for the serious users, this shouldn't be a problem. In fact, since there are more in-depth ideas surfacing about how to rate and such, this matter shouldn't be too much of a problem, as users will be prompted to play the game for a while before rating.
The fault could happen, but it shouldn't be expected, could it?