The connection between the Joker and the shooting at the screening of The Dark Knight Rises screening in Aurora, Colorado in 2012 are well known.
While there’s no reason to expect anything similar of taking place around the release of Joker, theaters certainly are going to err on the side of caution.
While comic book movies have become the most popular topic for theaters in recent years, few movies of any sort have been seeing the scrutiny that Joker has been getting before it even opens.
Of course, the reasons for that scrutiny are clear.