Eh, I wouldn't judge this on an axis of kindness, so much as just different types of obnoxiousness work for each of us. I get a kick from plenty of less-than-kind humor if it's coming from some place that hits my buttons right. But Letterman has always shown contempt for certain things I don't want stomped on, and that rubs me the wrong way. (No, Paris Hilton isn't one of them.)