But from a character building point, it's more interesting to have heroes who choose not to
I agree, I was just saying. To tell the truth, I'd never really want to see Batman kill the Joker in the mainstream continuity anyways. Maybe a separate standalone story, but not the main continuity. The Joker's one of the best villains going and writers are always finding new ways to use him.
But just in general, I don't think Batman can bring himself to cross that line. I'm reminded of the Batman Beyond film, Return of the Joker, where Joker had tortured the animated shows version of Tim Drake and warped his mind. Batman had Joker in his grasp and threatened to break him in two. Joker responded with a "if you were capable of that sort of fun you would have done it years ago", which says a lot about the whole thing, whether it's the animated stuff or comics. Even death's kind of a joke to Joker and he even recognizes Batman won't cross such a line, as he sees it as going too far.
That was actually the crux of Jason Todds argument and feelings of betrayal when he came back in "Under the Hood", that Batman didn't kill the Joker; which was probably a representation of the arguments of any fan who thinks Joker should have just been killed by now.
Batmans career started with death and his purpose is to try and prevent what happened to him from happening to anyone else again. It's about saving lives, not ending them. But I guess some folks just don't understand such an ethical line, which likely echoes a given persons own view on whether certain criminals should live or die (see Death Penalty debate).
Edited by dl316bh, 09 November 2010 - 08:50 PM.