Have you spoken to any police officers lately about their jobs? My next-door neighbor in my hometown was a state policeman who had guns and knives pulled on him several times in his career (during ordinary traffic stops, no less). If you're a cop working in a high-crime area, you're going to be dealing with the worst of society on a daily basis. I'm very thankful that my computer can't sporadically decide to physically attack me while I'm at work.