::Squints Angrily:: You would reduce it to a math problem, wouldn't you?
That aside, I think it's a great illustration as to the perils of vigilantism and at the same time illustrates the need for structured law based on fairness and investigation.
So let me ask you this. Do you think the action and the reaction need to be identical to have the same value? Not necessarily in the whole framing scenario, but in that often the idea of "an eye for an eye" comes to be unreasonable for a whole list of reasons.