fighting to "prove" you're a better man is fucking stupid, and only proves your making up for something and are weak minded. keeping that in mind, if i ever got into a fight, it would be in self defense, or if someone really really deserved or needed it. and in either case, my only concern is that the guy gets hurt and im not. so if a roll of quarters gives me an advantage then fantastic, id use it.
but really with fighting in general, fuck the other guy, why would i want it to be fair? i want to win and him to loose. why should i give him more of a chance to hurt me if i can prevent that? thats not being a coward thats being smart.
now, if you are fighting for sport. and you cheat then sure its lame. but id never fight for sport.