Actually I appreciate the guys perspective on this too, because yes, I don't want them to think I'm flirting, but I also don't want them to think I'm some stuck up snob that was too good to appreciate another hot car. Hence why I'm asking for the feedback. I have a personalized tag as well so yes, I would be very easy to track down if someone decided they wanted to do that.
Right now I just sort of stay to myself unless they initiate conversation or they wave first.