Yes that happens all the time here in the back country of San Diego. What is the proper bike behavior for this situation? Earlier this week I was behind a large truck with a nonexistant shoulder. The truck drives past a biker, the force of the wind pushing out and then the vacuum behind the truck pulling the biker in combined with a rocky shoulder caused the biker to crash. I stopped to see if she was OK. She was pissed at the truck as if he had done something wrong. What could the trucker do? Narrow road at 50mph with traffic coming the other way. The biker is taking their chances if you ask me.
Also on another road they block the road 3 to 4 wide. I am forced to go 15 mph behind them until no oncoming traffic and then can pass. What are the rules of the road in that scenerio? Personally I would like to mow them over.