I work in the public service and see a wide variety of people daily and interact with them and I have to say that its not a surprise to me that the majority of these new gen rampage/loony-tune/robotic killers are twenty somethings. I think technology has a lot to do with it. I believe a chair in the middle of a hallway confuses them. Many have faced no rejection or mental adversity their entire lives. I think their brains are wired different. Btw I'm not saying ALL.