I get the wave a lot, I mean when a motorist waves you to go ahead, Funny thing is I get irked because they always look so impatient and condescending. Rarely do I see a smiling, willing face behind the wave. I lump this in with the folks that wave you through a 4 way stop on their turn after you purposely slowed to allow them to go through the intersection so you can roll through without stopping. Funny how a 4 way stop becomes way more complex when there's a bike in the mix.