I don't understand what you mean when you say "it" was a joke, but also the point you were making was not a joke. What is "it" if not the point being made by the comment?
I think I see what you're saying - but the replies didn't accuse you of thinking it referenced black people. They disagreed that it is an example of something which is likely enough to be misinterpreted that it should have had a different name.
I thought that the implication of a connection between persons identified as "DARK" and vehicle damage had enough potential to be misinterpreted (either accidentally or maliciously).
It was just a throwaway comment that people have taken quite seriously.
