10 Things You Didn't Know About The Joker
1. Batman's Considered Killing Him Loads Of Times
One of the most confusing aspects of Batman and The Joker's ongoing rivalry is that the Dark Knight keeps letting him get away with it. All well in good during the early days, when he did his level best to knock him off; and a lot more excusable when he wasn't actually killing people in the fifties. Nowadays, though, when he's been consistently breaking out of Arkham and going on endless killing sprees, it seems like Batman would be doing the world a favour by getting rid of him more permanently.
The most common explanation is that the Caped Crusader doesn't want to break his precious no-killing rule, which seems like kind of a poor excuse considering the amount of people's deaths he's then sort of complicit in. Still, it's a superhero comic about a crazy rich person fighting crime, so you give it a little leeway. More interesting is that the Dark Knight genuinely has considered killing The Joker on numerous occasions.
The Clown Prince himself has attempted to finally bump off his nemesis, too, including a story where he lures him into a trap and genuinely thought that Batman had died. He snapped back to sanity, got plastic surgery, and lived like a normal person for a bit. Batman turns out to be a alive, and everything returns to normal.