For another perspective, my commute is a routine of watching cars break the law and endanger me with impunity. It's only superficially acknowledged by others and I have yet to see a cop pull over a car for committing an infraction against a bike.

So while I do obey the law as best I can, it should be easy to see why bikers would stop caring. The law is not enforced, even when a cyclist dies. So where's the merit in the law, if you're a cyclist?