The Prince wrote:
But what's the point of passing judgement, killing day in and day out, those already in jail carrying out their sentence or awaiting trial?
It is a critique on the failures of the penal system. If prison was at all effective in deterring crime or rehabilitating criminals than there would be no need or popular support for Kira. However, as it stands, serving time is akin to a badge of honor among criminals and functions as a training ground where criminals can share tips of the trade. The recidivism rate in the US is 60%. Prison fails its founding philosophy on all points and simply serves as an astronomical public expense where we quarantine people that are poisonous to society. The irony is that it is so expensive to keep people in for the length we deem just in our laws, we have to let people out even though they are still poison. Not only does it not deter or rehabilitate, it also fails to provide justice.
The Prince wrote:
Is killing innocent people along the way, in order to allow yourself to kill "bad" people justified?
The reason the death penalty has been banned in many states is this same philosophy... we cannot ever with 100% certainty be sure that the person accused committed the crime, so there may be mistakes in meting out capital punishment. One innocent person killed would be unacceptable. Texas, however, is more than willing to take that risk and carries out the largest number of executions. It is a cultural choice.
I won't comment on killing people you know to be innocent because they're troublesome, that's Russian justice.
Although Kira was the quintessential anti-hero, crime went way down and victims felt justice had been served.
Until there is a clockwork orange method of altering criminal behavior patterns, jail will always fail its purpose.