I also have to disagree with this. Butterfly knives were “the cool thing to have” when i was 13 (close to 25 years ago) and we definitely did not have youtube telling us about them and pretty much everyone in my class/city had them. I’m not saying it was the right thing by a long shot, but depending where you live I’d guess your kid will end up getting one eventually if they really want it. Imo it’s better to be educated by yourself about the why knives should not be carried and ever considered to be used etc, rather than your kid carrying one in their backpack cause they are trying to hide it from you.

I strongly disagree with that. As we grow up we need to be exposed to dangerous things in a safe environment, so that we are not confronted with them later when we have no one to teach us. We are surrounded with dangerous tools (such as stoves, cars, freezers, furnaces, lawn mowers, credit cards, the internet, television, casinos, fast food, etc, etc) that absolutely require training to use. As a parent it is your job to provide that training.