Unfortunately there is nothing we can do about bad drivers other than watch out for them. There are many things that irritate me daily. For example, when I'm on a bike at an intersection and it's my right of way but the car makes me stop and wait anyway while making eye contact with me. If they only new how much more effort it takes me to get my bike going again. Or, when I'm hauling butt down a steep hill doing the speed limit on my bike and they insist on driving way to close behind me, or making a dangerous pass. I mean I don't plan on crashing when I'm going 40 mph down the hill but it's not impossible, and they would just run me over because they don't have the logic to stay far enough back to stop in case of incident. Actually I get just as mad about illogical selfish drivers when I'm driving a car. Yelling or flashing the finger will only make a bad situation worse.