If it's not, then it's not a quantum leap to go from movie super-heroes solving problems with Uzis to interactive, bloody video games that are played for hours, to knocking off your social studies teacher for giving you a detention. We must take threats of violence as seriously as threats of suicide. Lock up or discard all guns. Eliminate all violence within the family. Parents need to model a non-violent response to anger.
Humiliation is a psychological slap in the face.
Empower parents to react quickly to a threat of violence. All threats are to be considered serious. Don't hesitate to call the police. Discontinue the playing of violent video games and strictly monitor TV, movies and on-line activities. Give strict consequences for alcohol and drug use.