Originally Posted by Marnath
Never show someone like Duv mercy. Killing them is the only moral choice. That's a sin Batman commits with alarming frequency too. How many people has he murdered because he keeps sending Joker to a place he knows won't hold him?
Strongly disagree. Anyone who wants to keep the "Good" label, and not be in the Punisher's category of barely-non-antisociality, DOES NOT deny a villain the option of choosing to reform, make restitution and eventually be redeemed by doing more good than they previously have done evil. Every person that the Joker kills is solely to be blamed only on the Joker and not ever on anyone else who could have theoretically killed them. After all, you could prevent all future murders by just killing everybody
(which is precisely Judge Death's logic, IIRC). Past behavior is not indicative of future possibilities; anyone could wake up with a different alignment overnight, so you always should work to prevent crimes AS they happen, not randomly execute anyone that you think MIGHT commit a crime later, even if you think that because of a long history of previous crimes (nor is capital punishment ever anything but thinly-disguised vengeance). Heroism is NOT about expedient, "get it over with" solutions. It is about accepting the risk that things may go wrong, and assuming personal responsibility for stopping that wrongness AS it happens. The correct solution is not for Batman to kill the Joker, it is for him to turn Gotham's run-of-the-mill criminals over to Robin and Huntress and so forth, and spend the rest of his life watching Joker 24/7 like a hawk, and making sure his natural lifespan exceeds Joker's or that he finds a replacement to take over the vigil otherwise.