Many people carry a pocket knife all the time (except on cruises and airplanes)
I carry one, not to cut people, all the time except as I said in the title above. It's part of what I do - keys, knife, cellphone, fingernail clippers and change. No one that has an active life on boats, camping, in the woods, etc., is going to be without a knife. We stick the same stuff in our pockets every morning.