Hmmm. What if there are others like Arata who don't actually care much for participating in team events but are enticed by another team for whatever reason (a bribe maybe). The only side that stands to lose anything from getting caught is the team, not the colluding player. That doesn't seem just. It's like a smart student letting others willingly cheat off him, and never having to worry about being penalized for academic dishonesty. Of course the scenario is hypothetical, but it could happen after the precedent is set.