He's paying $80 bucks to fill his tank every week. He's just mad at you because you aren't.

Smile & wave. If their window is open, yell, "I love you!" It puts the h8ters off their game.

I just yell back "No!" or ignore them.
When I was stopped at a railroad crossing recently, I had this strange conversation

Lady -"Why do you ride in the street?"
Me -"Where else would I ride?"
Lady -"On the sidewalk" (with an implied 'Duh')
Me - "Well, as you can see, there's no sidewalk here. Most sidewalks are not safe and sometimes even illegal for bikes. Plus, you cant really go very fast on the sidewalk"
Lady -"Oh, just wondering"

I would like to think that was an educational moment for her than might change her attitude about bikes on the road, but that's probably just delusional.

They never seem to like it when I yell back for them to get off MY road.

Say, "Get off my back!"