From the comments:
"Anybody carrying these types of knives are looking for physical trouble; instead of counting on their moral-minds to avoid any violent confrontations."
Arrrghhh !! It's holier-than-thou dipshits like this who don't understand the nature of violence. There are predators among us who will inflict harm on you for their entertainment. You cannot simply "avoid any violent confrontations" when you are being hunted. My daughter would be a rape-victim statistic if she hadn't had a knife on her person.
I just hate carrying either a knife or a ball point pen that takes two hands to open. It's just a stupid, unnecessary aggravation. I almost always am holding something in my left hand when I realize I need my knife to cut, or open, or pry, or poke.