I say this with the latest Saw movie just about to hit the cinemas. Not knowing what it was about I watched the first one a few years back. It then crossed my mind that people actually pay to see others being tortured, mutilated and eventually murdered in the most brutal ways the writing team can imagine.
What people do in their own time is their business I suppose but consider this. We are a mix of how we were brought up and what we do, see, think and the people we spend our time with.
If we are putting negative stuff into our heads then it simply has to have a negative impact on how we feel and therefore act.