That more or less tracks with my own thinking. Piaget's theory is a part of it, but much more immediate for me is my own experience, because as an adolescent things like movie violence, RPG violence, even real violence presented on the news were something that I experienced only in a very abstract way; whereas now I sometimes find it difficult to enjoy the sort of shoot-em-up action films I used to love because I am so bothered by the death and injury. Which kind of sounds like I'm saying that I have evolved some sort of higher thinking on it, but I think it's as much accidental as anything. Maybe part of what I'm wondering is whether we're doing well enough, as a society, in teaching this.