I've played plenty of video games where limbs are cut off, heads are blown off, people are blown up, thrown around like rag dolls (hence the name rag doll physics), liquified, electricuted, burned, frozen, crushed, eaten alive, ripped in half, and lets not forget vaporized by vengeful ghosts.   I've also seen my fair share of  violent movies with again the list above.   There have been studies done where they have two people doing different activities.  One person is playing a game like Doom (wooo doom, run and gun and boom and fireballs!) and the other is playing solitaire.   .....  ...  ... I doubt that the results would be very shocking.   Now... lets say you have two people in different situations.  One person in a room full of people who constantly tease and redicule and generally exclude said test subject, and for the control we will put the second test subject in a room by himself playing solitaire.   Again I doubt the results would be very shocking.   Test data can be taken and applied (quite liberally by some) to show numerous different things. 

People are not lab rats.  When you have an experiment you need a control.  A control is a situation that is supposed to show a normal occurance without a catalyst interveining.  All our lives we are showered with events that act as catalysts.   When I was in a car accident, I happened to be wearing my seatbelt.  If I had not been, I probably A.  would have died, B.  Would have been paralyzed in any number of ways, C. Lost a lung D. Ended up in a coma, or any mixture of the above events.  But I did wear a seatbelt.   All I did get was 27 stitches and a totalled car.  Needless to say, I will always wear my seatbelt from here on out.  I've heard of people who have said that not wearing a seatbelt saved them.  Thrown clear of a vehicle and where they were sitting is left a crumpled up space.  Two situations that are alike, resulting in two seperate results.  The situations are not Identical.  You and I are not Identical.  You and I both react differently to any number of events.  We deal with stress differently, we deal with pain differently, we deal with people differently. 

You have heard it many times by many different people.  Everyone is unique.  There can be no control.  Nothing is 100% 

I for one like it that way. 

I guess all I'm really saying is people would rather find a scape goat than to deal with the problem.  Rather try to medicate symptoms than deal with the disease.