 Philip Martin of member station GBH in Boston reports. Karen Mapp, a professor at Harvard's Graduate School of Education, has never been targeted, but she wonders aloud when they might come for her. Professor Mapp's reference to they is to right-wing activists who have leveled what she terms selective accusations of plagiarism against four black women at Harvard. Why is it only black women? It seems like, at least in the case of Harvard and some of the institutions I know,