I had one of those on the front of my ‘69 GT back in the early 80s. Back then, nobody thought twice about it. It was more about being a rebel than any other meaning.
I had one that was on my demon when I bought the car.
Then I had the car at car at a friend's storage place in the city and someone took the plate off and scratched it all up and bent it and left it on a bench a few blocks away. They didn't do anything to the car.
After that it pissed me off because I feel like that plate was my plate, regardless what it means. So I bought another one off Ebay and that one is on my dart.
Ive had people say they are surprised I would put that on my car. I always say "why not?" To which they can never give an answer.