It's not a big deal when you're playing for fun, or even when you're playing a local tournament with a bunch of friends where winning buys you nothing more than bragging rights. An opponent makes a mistake (like misjudging a turn, and having a little of their ship's base off the mat at the end of their turn) and instead of insisting that they remove the ship, we instead allow the game to continue as though their last move hadn't actually destroyed the ship. The idea is that because we value having fun more than we value winning, we are willing to relax a ruling because - hey, it's our game.
I don't know anyone hyper-competitive enough to have a problem with that.
But things are not so straight forward when you're playing in a where ranking matters.
If Johnny-NiceGuy is in a regional tournament, and allows Bill-WannaWinBad to keep in play a ship that ought to be forfeit on account of flying it off the map because Johnny-NiceGuy is in fact a nice guy, and Bill-WannaWinBad wants to win so bad he is willing to accept the charity even though he knows it will skew the swiss round numbers, and may even give him a win his bad flying should have cost him - if a judge is there and sees this...
Do you believe that the judge who witnesses this should remain quiet because it is a gentleman's agreement after all, and if Johnny wants to be nice, and Bill wants to accept Johnny's niceness - that's none of his (or anyone else's) business...
Or..
Do you believe that the judge who witnesses this should step in, clarify the rules, and insist that Johnny and Bill play by them, removing the ship that was flown off the map from play..
?
NOTE:
...Tournament Organizers and judges for premier championship tournaments (Regionals, Nationals, and Worlds) are expected to commit their full attention to organizing and judging the event, and therefore are not permitted to participate in their own Regional, National, or World Championship events as players