Almost everywhere in the United States, there are far more motorists than bicyclists. Probably, far more illegal acts are committed by motorists than by bicyclists, in total.

I'm probably skewed because I live in Portland, but I can't drive to my girlfriend's house (3-4 miles away) without seeing a half-dozen (or more) cyclist-infractions and not one motorist-infraction.

I suspect it's for a few reasons... Portland == cyclist friendly city, cyclists aren't likely to get sited, and cops are looking for motorists to sited (see #2).

You're forgetting about all those bmx gangs that roam the cities in search of drugs and sex.

Cyclists in my state consider themselves strange beings that can follow the rules of automobiles, bicycles or passengers according to their whims. They need not stay in bike lanes if they don't want to. They can use crosswalks and expect you to stop, but since it is annoying to break and start over, they can just roll right into it without a second glance. No need to signal or stop at stop signs - again, just keep rolling "they're hating, patrolling, trying to ..."