Just a random thought, do you wave to other GTI Drivers?
I've noticed that some drivers do and some don't. Is there a written rule that you only wave to the mark you are driving or just don't at all.
I know that Mini owners do and VW Transporter (campers) do as well, and Bug owners.
Any light that people can shed on this would be grateful so i don't look stupid either waving at someone or not waving at them.