Roughly 20 years ago my son was in BSA and got to carry a "totin" chip. It was a card certifying he had passed a knife/axe safety class. Idea was if an adult saw a kid missuse a knife or axe,the adult tore off a corner of the card. When the card had no corners left it was confiscated and the kid had to re-take the safety class. While he was at home one day he began playing with a bread knife and broke the blade. I asked him for his TC, confirmed the procedure for unsafe use of a knife, and tore a corner off the TC. He couldn't have been more shaken if I had slapped him. Never saw him misuse a blade again.