Oh Gawld, Elf n Saftey would cringe now...as kids (say 11 to 16) in the 70s, we had sheath knives, proper things with a 6inch (roughly) blade, i thought everyone had them on the airbases we used to live on, great for whittling spears, french arrows and playing chicken where you spread your legs as far apart as possible, your opponent doing the same about 3ft opposite you then throw the knife so it stuck in the ground between your opponents feet, who would then close one leg to that point, each time making the next throw more dangerous
. No-one lost a toe or even got stabbed...
Its a wonder we survived
Edited to say, no-one withing my group of well armed friends ever used them maliciously against another person, it just never occurred to you ...why would you do that ?