APA: VG Violence

An APA article (American Psychological Association) about how research strongly suggests how violence in video games can indeed increase aggression in players.  As you can see it answers questions and covers bases.

 
VIOLENT VIDEO GAMES CAN INCREASE AGGRESSION
May Be More Harmful Than Violent Television and Movies Because of the Interactive Nature of the Games

WASHINGTON – Playing violent video games like Doom, Wolfenstein 3D or Mortal Kombat can increase a person’s aggressive thoughts, feelings and behavior both in laboratory settings and in actual life, according to two studies appearing in the April issue of the American Psychological Association’s (APA) Journal of Personality and Social Psychology. Furthermore, violent video games may be more harmful than violent television and movies because they are interactive, very engrossing and require the player to identify with the aggressor, say the researchers.