Trivia: The font used for Live With Murray Franklin is identical to the Batman animated series titles. The name of the font is "Plaza," for those that might be curious.
Trivia: Arthur has a copy of The Blue Boy by Thomas Gainsborough hanging on his wall. The same painting is appreciated by Joker in the 1989 Batman movie.
Continuity mistake: At the end when Arthur/Joker dances on the police car's hood in front of the crowd, in the shot behind him he keeps his arms down, but when it changes into a frontal shot on him he keeps them lifted up.
Continuity mistake: When Joker confesses that he was the one who killed the three guys in the subway at the Murray Franklin Show and also says "It's not a joke", he keeps his gaze turned towards Murray in one shot and towards the audience in the next.
Answer: In a nutshell, it's because the film's protagonist is a mentally disturbed killer, and certain groups in America thought the film's violence would lead to copycat behavior.
Phaneron ★
I never got this aspect of the controversy, if anything, it goes to show what can happen when mental illness goes untreated.
ctown28 ★
I agree with you on that, but unfortunately, there's so many people, at least in the United States, that have no sense of nuance and are prone to knee-jerk reactions. They would rather condemn and blame different kinds of media for society's ills, rather than stop and look at the message something is trying to tell.
Phaneron ★
I read about the concern over possible copycat behavior in an on-line article; Phaneron's answer is correct.
KeyZOid