That is common knowledge around where I live... A suburb of Detroit... And, my own daughters told me of it almost 10 years ago as teenagers. I asked em one day as we walked thru a crowded venue... “Hey you guys what’s up with the pink and purple hair streaks?”. They both said it at the same time... “Black bait”... I couldn’t believe it!!
Yeah, well, the shade of red in question in this case is legit, in that, many individuals, including women, come by it naturally.
Not that those that come by it by other means can’t be spotted, or at least guessed at. That said, even if it’s obvious that they arrived at that (once again-natural, even if rare) color through chemistry, do they really deserve to be presented with such a crass indictment?