Lot of "sensitive" members. Don't wave, your just plain rude and a meany. We should know what kind of vehicle you drive, this way we can wave at everyone. If not would we be rude? Really, what age demographic are you in?
Look either you do or don't wave, flip off or just ignore another rider. I see one on the side of the road i slow down, or pull over if they need assistance. I've never been bent out of shape because someone didn't wave to me. 38 years in the saddle and i don't sweat the light shit.
YMMV