I took a couple of DUers to task for that a while ago, during the Bush years. I believe it was over calling Condi Rice "Aunt Jemima". I even called the poster out and asked if he or she was black-no, of course not. I don't remember who it was, though, but he or she justified the comment by saying that Condi was not acting in black people's interests, therefore it was okay to use that term. I told him or her that he was lucky there were so few black posters on DU to offend with those kind of comments.