Which colour to use? Surely someone will take traditional "redding up" as an insult to native Amercians.

But is it the description, or the actual activity of Blacking up which is being questioned? Or both?

I see no good reason why this traditional activity should be affected by a SUPPOSED or IMAGINED link. Are we going to prevent childrens face-painting, actors make-up, clowns, and all similar things?

It is similar to the thinking of the PC "gender police" who tried to ban the word MANAGER because it looks like it contains MAN.