I wave or nod, and so far after a year, no one has reciprocated. I don't care. I still go crazy every time I look at mine. I'm such a crackpot about it. Two days after I made them buyback my first one under the Lemon Law, I drove 200 miles to buy another identical one. Thankfully, its been perfect. I took a lot of abuse over that move. When I drive my 6Pack Duster, everyone waves at me.