Sure, the guys got angry. In reffed sports, everyone agrees to disagree by hiring outsiders to penalize infractions they catch. Hiring, training and administering the outsiders cost a lot, and over time, their presence affects the nature of the game - for better or worse, who knows. But in the end, they don't solve the problems - players will cheat, and games will be won unfairly. In ultimate, sustaining the game is more important than winning at all costs.
Players agree to cooperate based on mutual understanding of rules.
So players learn negotiation skills that emphasize mutual respect. We want to have fun playing well, so we constantly seek that balance of ego and community called Spirit of the Game. Spirit of the Game has to be on the rise, in ultimate and beyond, because technology has brought us an era where survival means valuing brains over brawn. It doesn't matter anymore that my teammates can tackle your teammates to annihilate your key player. Because it can't matter anymore that my country can blow up your country - everyone knows the devastation caused by nuclear weapons, and knows we're ALL worse off if balance is lost.