Won't speak for marcinek, he is his own man.
But for me, absolutely. Not often I admit, but I have seen people with knives that made me want to take them away from them. Likewise, although I don't comment or respond, there have been instances of showboat behavior.
I have been in a restaurant a few times and seen some rube whip out (yes, make a production of it) his knife, clack it open, and cut his steak with it in the restaurant (Buck 110). In one instance the guy loved the attention and made a special flourish when cutting. The waitress came by and asked him if he wanted a steak knife and he was obviously pleased. No thanks, he said. Your knives are never sharp.
Was in an office at a meeting with all white collar guys (mine goes blue to white, depending). Personally, I carry work knives with blades from 3.5 to 4 inches since I use them on site. But no one knows because I also carry a small traditional for times when that is the appropriate knife. The meeting is at break, and one of the white collar guys stops another and says "hang on a minute, you have a thread" and whacks open a knife of some sort with about a 4" blade. The guy with the thread is really uncomfortable. The knife guy cuts the thread, closes the knife, and looks at me and winks. He thought I would appreciate his crass ways because I am the construction rep. idiot.
Gone to lunch with guys from the construction sites several times and have seen them pull out fixed blade knives (maybe 5-6" blades) to cut up a burger in a MacDonald's full of kids. They LOVE the attention from the kids, and make a show out of cleaning off hamburger crap off the blades. Little boys in particular were hypnotized.
I can go on a on. That's just the tip.
Robert