i think the song is about the fact that many parents are to busy to give their children time and understanding and the fact that it was inapropriate for any parent to give their child a fucking gun but mostly that a person does not just wake up one day and go on killing spree there are normally various hints eg in the columbine case there had been suspicions that the boys were making home made bombs and the police ignored it its about realising that if we dont listen to young people who are in trouble or investigate allegations because we percieve this person not to be the type personally i would rather be questioned for hours to prove innocence than let a guilty person go free