If we follow modern day thinking, its society's fault, not just the courts, for the said kidnapper turned out.
Aside from that, there will be no just conclusion for Karma, because with super harsh terms (ie economically, militarily, or even disbandment) the theory Karma started this war on (theory of karma) will rear its ugly head to the enforcers of these terms.
If NPO gets too light of terms, NPO follows the basic war law of Planet Bob: revenge.
To break from my objectiveness, I believe CN needs NPO just as much as we need MK or FAN. There needs to be a Joker to everyone's Batman, or else the story becomes dry.