I've had a knife in my pocket or in a sheath on my side be useful at many times when having it there saved what was a potentially hazardous situation. I had a bosun on a ship who seemed to not be a big fan of me, until the one time we were next to each other and a line got jammed. While he asked for a knife, I was cutting before he could finish his sentence. He shortly thereafter bought a Mora to carry.

A knife is a tool that can be used as a weapon, not a weapon that can be used as a tool. Knives are some of the original tools made by early man, and woman.

Great to read of this guy taking action, loved that it seems to have happened in NY, and it's so much better that he is not seeking attention.