It's my belief that cyclists that irritate motorists are dealing with motorists who have issues anyway and are just looking for someone/thing to take it out on. As a rule, my daily commutes on a busy street are filled with motorists who go out of their way to watch out for me - sometimes to the detriment of the other drivers! LOL Most of my close calls have come from inattentive drivers. But it could be that I live in a biker-friendly city.