From what I have observed over the years, 90%+ of bicyclists consistently and flagrantly ignore traffic laws, especially: 1) failing to stop at stop signs; 2) not signaling when turning or stopping; and, 3) being over a certain age (12 is popular in many jurisdictions) and riding their bike on the sidewalk. Fortunately these transgressions, while undeniably annoying to others, usually don't result in serious accidents. Of course, there are the dumbasses who ride their bikes against traffic on a busy street; they're a special kind of stupid. I'm not suggesting those morons deserve to get splattered hit by an oncoming vehicle but if it happens and the bicyclist is killed, the Darwin Award for playing chicken with a car/truck/bus (and losing) seems appropriate. I'm not disputing there are plenty of drivers who operate cars with a similar disregard for traffic laws, but that percentage is significantly lower based upon what I have witnessed. Anecdotal, of course, and YMMV. The real problem is when alcohol, texting and/or speeding come into the picture -- things some car drivers seem to integrate with alarming regularity. Thankfully, most bicyclists don't engage in texting while riding. And, as we're often painfully reminded when there is a bicyclist in our lane, they're largely incapable of speeding.