Manboychef -
From an emotional standpoint I applaud your sentiments, but if you were granted your wish to see a society based strictly on people retaliating to people on the behalf of other people, you would quickly understand the need for a legislative entity. For example, did you not deduce from my post that my son - indeed my whole family - are trained fighters? And how is that relevant? Well, what if my son were on that bus and retaliated from a strictly emotional, 'teach them a lesson' position. He'd hurt them all very very badly, no question. Would that be right? I mean, what is the standard governing 'appropriate violence for vengeance purposes?" Or worse yet, what if he decided to impose his every whim on anybody he chose via the threat of immediate physical injury? How would a person lacking in fighting skills address this in your proposed context?
It is my belief (again, just an opinion here) that the only truly appropriate motivation for retaliatory action is to PROMOTE AND ESTABLISH PEACE, not promote and establish who's the baddest or the rightest or the most victimized or what have you.