Stab Schools?

Are children today more threatening than previous generations or are they terrified into knife carrying? Is the problem of blades in schools exaggerated? Don’t most pupils just want to get on with learning? Is the phenomenon encouraged by schools inadvertently celebrating knife carrying in workshops and drama sessions aimed to warn children against carrying knives? Will a harsher line make it more of a rebellious act to carry knives, or are should schools adopt metal detectors and a zero tolerance approach?