The same thing happend to us the same exact day when we got yelled at. We were riding in a residential area ( great for riding), we had no stop sign however this guy did. He , of course, thinking that he is so important on his huge truck with a hure beer gut hanging out yells : where are you going you mtf .... I dont think he was paying attention where he was going and what was infront of him.
But I think it made him feel great to just yell something, of course my boyfriend didn't hold it back either. One thing I would wanna see is these kind of people get on a road bike and climb a hill, maybe then they would shut up.