I hear you... and have nothing to offer that would answer your unaswerable questions.
The "yayhoos" you refer to are just the kind of people who are likely to be obnoxious on any given occaison. I can only assume that they are the adult bullies of our society that like nothing more than to bug/pick on others because it's fun/entertaining. I only hope that one day somebody scares the beejeebers out of them when they're in a stressful situation and makes them feel as vulnerable as we do.
Last week my cycling friends and I were joking about inventing some device that could be hooked up to our bikes that would spray paint on cars that scare us or pass us too closely. It could be triggered by our left braking hand as a little button. One press would release some paint that writes out "leave cyclists alone" on the side of their car. We also thought about installing some retractable device that would scratch their car (like in movies when the hubcaps of cars have knives that come out to flatten the tire of another car while driving). Ok- impractical and childish- be we laughed about insane ways to make cars leave cyclists alone. We just hate the feeling of vulnerability that we have at times. We, admittedly, had too much time on our hands...