Don't worry, the shock programs don't work here in the US either...and trust me it's a lot more startling when we can show them the dead body that's had half the face blown off with a handgun. Yet the research says it doesn't matter. It's a documented phenomenon that adolescents don't comprehend the fact they're not invulnerable. Just be thankful it's "only" knives, you don't get the collateral damage we get. The 10 year old shot because she was standing outside her home down the street from some gang members, the victims mother/girlfriend/grandmother who happened to be with them...