Highly unlikely one would make it this far before authorities had him in a straight jacket. Not sure the way to deal with ‘mass violence’ is by putting it on a big screen and growing a home-grown wanna-be. While it may not be as financially beneficial, a bio about John Spenkelink or Ted Buddy with old sparky would possibly deter this type of violence NOT make it Hollywood. Any loss of life attributable to this movie or referencing the Joker is on Hollywood for sure. Mental Illness is not a Joke!