It's not a piece of crap that is astroturfed out or anything, just old.
It is not the best car on the road, but far from the worst.
I only try to look at throw a hand up at the guy next to me as we are stuck in traffic. I know I would be waving all day otherwise

You mean you aren't supposed to wave with only the one finger

JK
I guess it is the same for my motorcycle. I generally wave to all motorcyclists, but only about 30% of the Harley riders will wave. Yeah, I ride one of those crazy fast "rocket bikes."
Guess it's just another one of those things I will have to live with.