I agree. Adam Gorst had a thread a while back and there was a lot of discussion on context. There's a lot of good 'ol boys around here that wouldn't use their knife on you in a fight for one simple reason - it's hunting season and they wouldn't want to dull it on a human when they are going to have to use it in the field this weekend. That was supposed to be humor but it's not far off.
Take a look at the virtual blade. They are pretty inexpensive and simple. It's a plastic knife with felt on the edges. Apply colored chalk and good luck.
Take it out on the heavy bag,