I thinks its something along the lines of trying to desensitize yourself to events surrounding your trauma. I don't really like true crime, law and order type shows, but I watch military movies and action shows (even though most are far from accurate of the human body or abilities), as a way to try and keep myself desensitized to things surrounding my own trauma history. I was never that way inclined prior to exiting the Army... but am now after the fact with combat, peacekeeping and humanitarian trauma exposure. Not addicted to them, but I do periodically watch those type of shows intentionally, just to gauge my reaction. Some impact, most do not.