I was there when McDonald's introduced Shanghai McNuggets, asking staff members at stores around the nation to don replica coolie hats.That was in 1985 or thereabouts--before corporate sensitivity training but long after Americans should have known better. I still remember an Asian couple approaching the counter at a McDonald's in Columbia, Missouri, glaring at those hats. Of course, in 1992, when presidential contenders Bush and Clinton both toured the Old South, at least two publication