You know Birdgun Quail, most of us dress somewhat close to what we wear on the range anyway, at least some sort of Western flavor, the exception being the yuppies in their alligator shirts, short pants, etc., and real cowboys, they wear ball caps and tennis shoes, for the most part.
Nobody laughs at me, at least not to my face that I have noticed and I don't have the time or energy to deal with small people anyway.
I do have a yuppie friend who is about 15 years younger than me. We have been friends for a few years, hunt and shoot together all the time.
I got in to CAS and took him and his wife out with me and my wife to the CAS range to do a little practicing. I figure as long as I'm practicing I'm dressing up too, not to much from how I normally dress but they were both visibly embarrassed to be seen with me.
We went out to the range, did a bunch of shooting, had a good time, I stopped by fancy place on the way home and bought them all lunch.
My yuppie friend and his wife weren't too happy about stopping, but hey a free lunch. No one in the restaurant even batted a eye, that goes for when I'm stopping to get fuel going to or from a match, no one seems to notice.
That was the last trip for my yuppie friend. We still hunt and shoot together but there isn't any CAS in his future.