I wave too and / or flash (my head lights, not me personally) but people round here just give me that look as if I'm some kind of escaped mental patient.
I've come from a background of original mini owning where everyone acknowledged each other so it's a shame really.
I wonder if you were the 500 that nearly made my other half crash in Middlewich a few weeks back. He thought it was me
I used to wave/flash when I had a Mini for a year but haven't since I got Luigi. My other half did wiggle Luigi's bottom at another black 500 (maybe that was you too?) and tends to do more flashing. Since having a red 500 flash at me the other week, I remembered what a good feeling it was to swap waves and flashes so I've resolved to flash every 500 I see (including BSM learners on lessons