Was riding on a rural two lane road yesterday and suddenly a rider yelled, "on your left". This after being passed by several cars over a ten mile stretch. The shout broke the enjoyment of the silence I had fallen into. I wanted to shout back for him to shut up. I know that would not be nice. He probably thought he was doing what he was supposed to do, but I disagree that a need exists to announce your presence on a public road. Thoughts?