I ran across this story a while back, and finally decided on this thread.
I once was walking down a side street near where I was living at the time and saw such an item dangling from the trailer hitch of a parked truck. I marvelled at how anybody could actually flaunt such a thing around.
Imagery came through my mind of a man who frequents the prostitute corner, picks up a worker, and then a few moments later the door opens because the girl is fighting to get out.
Someone who has to wave it as a flag makes me wonder all kinds of stuff like that.