The joker once made an interesting point about batman. A wealthy vigilante that has no respect for the law or due process. He is rich and powerful enough for the police to do nothing about his lawlessness. In short, (((bruce wayne))) has the police and media in his pocket. They all fly cover for (((batman))) while he goes on violent rampages, unchecked. If it was anyone else they'd be locked up immediately. I haven't seen all of these actors play joker, of the ones I have seen, Heath Ledger did it best.