What a wonderful thread! I had intended to post my own take, but honestly I think that this whole concept has been covered superbly before I got here. Someone (Lori, I think, with great insight as always) suggested that we think about how we would view the situation if we were discussing some other minority other than CD's: spot on! I suspect the reality is that pretty much everyone "notices" when any of us (of any kind or flavor) is "different" in any given context (imagine a white customer in a mainly-black store; or vice versa: or a short male in a Big and Tall men's store; or an old guy in a mostly-kids' store; or a Hassidic Jew in a white supremacist supply store; or any other out-of-context circumstance you can imagine). In way more than 99% of the time, people may "notice" somebody is "different" but not say or do anything at all out of line. That is close to the best any of us can expect, or hope for.
My own two "worst" personal experiences were (1) when I was walking past a group of high school girls in a hotel lobby, they became totally silent as we passed, and then I could hear the excited whispering afterwards; and (2) late one night when I stopped in a convenience store for a Coke, and a clearly-intoxicated young man stood aside, waved me forward and said "After you, SIR." The young girls, while "noticing," had the common sense or decency not to embarass me overtly, and the lout did his best but swung wildly and missed completely.
Hugs -- Diane