The lovely Mrs. Razor and I were eating dinner at a restaurant in one of those large highway rest stations on the way to Albany a couple of years back. At some point I noticed a middle-aged black man wearing (among other things) a casual vest, something similar to what you might wear with a matching three-piece suit (though obviously intended to be worn without). The back of the vest was hiked up, because it was caught on the butt of the knife he was carrying in his back pocket.
From what I could see it was a pretty average hunting knife in a black leather belt sheath. The sheath was tucked into his back pocket as in the photo in this thread. When next I saw him, making his way from his table to the salad bar, he'd fixed the problem, and the knife was no longer visible.
He's lucky it was me that saw him, and not someone more hoplophobic.