When I was road riding here in the Los Angeles area, I actually found quite the opposite to be true--it was always a fancy mercedes, beemer, land rover, etc that would mess with me, driven by some privileged young jackass who seemed to get a kick out of nearly killing somebody, all while texting of course (you know the personality type--would probably tweet, or post to Facebook how funny he thought it was if he ran somebody off into a gully, and then blame it on the cyclist). The workers in trucks, people in beater old cars, and so on never caused me any trouble.