Read this article: The Myth of the Scofflaw Cyclist.
I found this in the Portland bike forums this morning, written by a DC cyclist with a bone to pick about the perception of cyclists as lawbreakers. Don't get me wrong, this is not a treatise on why we should be able to break the law on bikes. It's more a study on the fact that people break the law regularly, whether they are in cars, on foot, or pushing pedals. The article leads me to assume that the fact that cyclists are perceived as lawbreakers any more than jaywalkers or speeders has more to do with our car-centric culture than whether we break the law more often than drivers or pedestrians (which we don't).
Check it out.