i think everyone does the flashing lights thing or just the head nod, we did with camaros and transam's of course u got i'd guess 80% of people who own the cars that dont care. 10% lazy and the rest r us. I normally just make eye contact and nod and the respond if not i just give a nice perfectly timed middle finger to get some kind of reaction. Hell even a cobra that was also all red with black everything gave me the nod and i returned it cause it was a cobra and not a mustang.