I know 2 guys at work who carry clip-out. I didn't ask about 'em until I got to know them a bit.
One (Kershaw) is a kinfe (and gun) aholic, but doesn't like to spend money. The other (Spyderco, typically, but I noticed he switched to BM when his 300 came in) fancies himself a knife guy. He's really just learning, but started up a company with some friends to have a fixed-blade made. Neither of them are on the forum.
I see guys all the time with clips. I don't normally approach strangers to ask 'em what's in their pocket. Occasionally when I see one from the Big 3 I am tempted - but I usually keep quiet.
I did ask a guy at a plastics shop which BM he was carrying, though he used a utility knife for the task at hand. He showed me, but wasn't overly interested.
Wasn't random, but I recently met a forum member. He's making a sheath for me. Very cool guy.