Folks in cars look for their tribe for sure.

Example: Ride an m/c and you will see them everywhere. Buy a Fiat 500, same thing... might be a stretch.

Even rodies charging in mass down the wide flood control bike path show little regard for others, running abreast 4 wide.
Their tribe, showing no concern for the youngsters riding with or into them at 10mph.
I use my bar-end mirror and move over to within 8" of the shoulder but some fool feels the need to yell "on your left" at full song.
I feel safer on the street than bike paths on the weekends.