adywan said:

Its a terrible tragedy. Some of the media over here have already been blaming the Batman franchise as they have been reporting that he had his hair dyed red and that he was calling himself the Joker. Maybe they should get their facts straight before trying to make something else out of this. They latch onto one little detail like the colour of his hair and blow things way out of the water, especially when the Jokers hair is green.

Maybe he thought he was Caesar Romero's Joker as his hair was never the same colour from shot to shot.