Don't engage the Joker. No, not even if you have superpowers, or if you have magic, or if you have a billion dollar robot suit. He strikes at weaknesses you don't know you have. He'll strike out at innocents. He'll play on your flaws. He'll get away, and then he'll know you but you'll never know him.
I'm not saying we sit down and shut up and leave this to the grown-ups. I'm saying that we be ready before we do anything.