So, when the bell rings and a fighter raises his arm to touch gloves before they mix it up, we should take that opportunity to fake a glove touch and break one of his ribs exposed by his raised arm. Nothing against it in the rules 
Every boxing match I've ever seen, the ref has them touch gloves, then sends them back to their corners, THEN the bell rings and they come out boxing.
EDIT: In MMA they seem to do that glove touch thing after the bell rings. I don't know whether what you describe is formally against the rules or not. I'd say there probably are sanctions of some sort against such actions. In any case, MMA fighters for whatever reason can expect a reasonable expectation that their opponent will not use the tactic you describe. This is not the case in the AH MA, a place where experience clearly demonstrates that there is nothing resembling a rule either in letter or in fact against HOing, ganging, running, etc. These tactics are a clearly accepted part of game play as demonstrated by the *ACTIONS* of the players, however this may conflict with the words of the players. Therefore, use these tactics whenever they seem appropriate to the situation.
