Maybe because they havent been initiated yet
I have a little guage to tell an enthusiast or someone who takes a special interest in Alfas, apart from the standard 'I use my car to get from a-b, its a tool' type of driver.
Test 1) If it looks like its been cleaned within the last week, 90% of the time, they drive an Alfa for a reason.
Test 2) If the badges look faded, 90% they're not enthusiasts.
Test 3) If the alloys are curbed all round, on each wheel, 90% they're not enthusiasts.
Test 4) If it's another colour other than Silver, Red, White ,Black or Crimson, 90% they're not enthusiasts
Test 5) If the alloys are 17" 50% they're enthusiasts 18", 90% they're enthusiasts, if they are 19" 99% they're enthusiasts.
Literally, one 159 I saw, the badge was white, it had faded soo badly, it had 16" 'curbed' hub caps, black exhaust and the holes where the parking sensors should have been. It made the car look very 'average' even though it was in a nice black colour.
I sometimes assume everyone drives Alfas (except Guiletta and Mitos) because they think they're something special, namely because you can get more reliable motors cheaper and newer than say a 156 and the fact there aren't soo many around not to mention road legal. I've actually seen one really 'chaved' up 147 that, even though it looks too blinged out, was in very good nick, so obviously the driver must have deliberately went out looking for one, as there are plenty of Saxos, Fords, Bmws e.t.c around. But then I've seen lots of 156s that look like battered sheds, probably bought simply because it was the cheapest they could get without knowing its deeper issues. I suppose there are quite alot of older model Alfas still knocking about, Im guessing most of the best offerings have been taken by enthusiasts though. Hence why I use my little test above to judge when to give a flash or wave;p