In the case of someone not in an association, the organiser should add him as friend in a game account so he can check the registered players profile. If you were not in his friends' list, then bad operation, but since you were not among those that claimed to be in top 3, it should not be a problem for the past competitions for your case. I think it is a must for the organiser to check and verify the statistical records of the players of those that claimed to be in top 3 and those not far behind them. In my opinion, if there has been someone who made it to top 3 in any of those past forum competitions only by posting images, then others have the right to contest if the pictures can be easily manipulated. It is not that someone likely cheated or will likely cheat, but it is a matter of good practice and that things are done properly.