It's not about saving lives. But I think that it's respectful and artistically sensitive.
When Gangster Squad was postponed from its original fall 2012 release date in the wake of last summer's Aurora, Colo., movie-theater shooting, [screenwriter] Beall and [director] Fleisher quickly mobilized to devise a new sequence to replace a violent mob-ambush scene set inside Grauman's Chinese Theatre (and glimpsed briefly in the first Gangster Squad trailers). "The decision to get rid of that scene was not one that we entered into lightly, but I think everybody felt like it was the right thing to do," Beall says. "And I think it's actually a better movie with the new scene" - a scene, appropriately set in Chinatown.
-LA Weekly. Scott Foundas. "L.A.'s Finest". Vol 35 no 7.