Paul, I have considered going around with black make-up myself because I believe in freedom of expression and that my face is my own to do with what I choose.  I have zero intention to slur anyone.  No person has the right, IMHO, to tell me what I mean when I do something with my own body.  If I hit somebody or spit on them, an action exists directed toward others that may be unacceptable.  If I simply put make-up on my face, it is the others who attack me.  I cannot accept being told what I mean when my actions only relate to my own body.