I've watched my first horror movie at the age of 7 and played a zombie and violent video games. I never once disrepected my family nor done crazy, violent BS.
If that were true then wouldn't everyone of us be out there attacking people and acting my psychos out there? A couple of my relatives had the same story too and none become aggressive.
Is that claim true or was the person messed up from the get-go and playing violent games just activated their dormant switch?