I don't see what's wrong with him having tattoos. They can put their own spin on him, just like Nolan and Ledger didWhy would Joker have tatooes? Why not put some on Bruce while we're at it? Taking variations are one thing. Doing stuff characters wouldn't do are another. Would Joker cut smiles into people? If he can't make his laughing gas he will. Would Joker randomly let Harley put tatooes on him? fudge no, he doesn't love her that much.