Even worse than Lecter must be the sociopath that the other sociopaths and psychiatrists run away from out of pure fear - the Joker. With his dread pale face, crimson red lips and poisonous green hair, the Joker doesn't even look like a human being. He could be thought of as death - or alternatively, dead. He's supposed to look like a clown, isn't he? And a popular explanation for coulrophobia is that clowns look like corpses or zombies. Remember that in his (usual) origin story, he fell into an acid vat. As everyone knows, acid is hazardous for life. The Joker should thus be dead by now. In fact, he is dead, or so he said in the 1989 movie.
Jack Napier is dead. I am the Joker.