lol, strange thread, however, i have an r32 golf and have been waved at my fellow r32 drivers more than once, i just wave back and thought it was strange i don't know her, then saw her again few days later and she waved again, the only connection i can think of is she has an r32 aswell!
Had someone do it while i was in my range rover aswell few weeks ago, again i was like who the fuck are you.. Only connection must be another range rover!
Was out with a mate last week in his galaxy, he was flashing like mad at this guy comming towards him, i asked who was that, he replied "dunno but it's another galaxy same as mine so thought i'd flash" LOL!!!