Lots of school shootings take place only to achieve national popularity. To get their voice heard, criminals must use violent means and destroy lives. There is not only no necessity for this kind of action, but more effective and easier ways exist. Lots of places attempt to set the blame on music and violent computer games. Music is an understandable guess, being how music can be highly inspirational and influential to weaker people.
Computer games are what they are - computer games .
Games are meant for fun and entertainment, not reenactment. That's common knowledge. Hunting is violent. Driving a car can be lethal. Football encourages beating the crap out of other players.