I would attribute today's offensive youth to a breakdown in education and principle. As long as you're well educated and have good understanding of principle and ethics, fictional violence isn't going to turn you into a thug.
I totally get off on fictional depictions (graphic or literary) of violence, but in reality I only use it in defense of myself or others. I certainly don't use it simply as a means of alleviating boredom or stress or negative emotion, nor do I assault people simply because I don't like them.