When I lived in Boston, it was really scary to ride my bike. I quit after about a year. My cousin was hit after the last game of the Bruins/Vancouver Stanley Cup Finals and spent a week in the hospital. She still has no sense of smell. The driving culture in Boston is bad due to traffic, poorly designed streets and people with horrible attitudes. Now that cars and trucks are getting larger and larger with even stronger engines, it's even less safe for bikers and pedestrians.
I will admit that there are bikers in Boston who don't follow the rules of the road and give others a bad rap, but doesn't give aggressive drivers the authority to run bikes off the road or plow through crosswalks.