I also have to defend these guys a little. I am new, and try my best to do what I am supposed to, but it is difficult at times to do that, and sometimes, I don't know exactly how to handle a situation. Heck, on my first day, I was in a left turn lane to turn left, waiting through the light and a guy in car yells at me "You are not a car, sir!" How is someone on their first day going to respond?
I say print out the link above and carry them with you. I know I am, and not only will I give tem to riders, but people in cars as well.