Here in the Washington DC/Maryland area, most cyclists don't stop at stop signs or red lights unless there is heavy traffic. They look both ways and if they see an opening, they just keep going. Downtown is even worse where bicycle messengers act as though none of the rules apply to them in any way. Up here, a few miles north of DC, it's just cycling aficionados ignoring stop signs. They are breaking the law every time, and they do not appreciate being reminded.