Seriously, it's really annoying. Unless there is some technical reason for it, which I don't think there is because I don't see every rider doing it, I don't see any good reason. Are they just trying to get attention? That's not cool. And I'm sure it wastes a significant amount of gas too. Harley-style motorcycle riders seem to do it the worst. Does anybody have a good explanation of why riders do this and why I should be more tolerant of it?