I heard the same sort of thing in the 90's when whiteboards were introduced. It came from the usual rag tops (DM, DE etc) stirring up a bit of angst then it just morphs into an urban legend.
Unfortunately people retain these little snippits and it goes to form their overall perceptions and we get to where we are now, actually legitimate issues surrounding race get drowned out, or dismissed, by the plethora of "fake news" racism stories.
Which again, the rags love to publish 20 point font headlines just to stir up more angst.