So I'm out on the B and I pull up behind a Harley at a light. The rider has no protective gear on what so ever. Of course I'm covered from the neck down in leather with a big old white full face Shoei on top. Anyway, he looks in the rear view mirror (surprisingly steady) at me and then turns his head to the side and spits. Now this isn't the first time I've seen this. Is this some sort of "Hey non American scum bag" sign or what?