Perhaps this is a good place to reference Sidney Hook's 10 rules for discourse from "Ethics of Controversy" given that #1 is Nothing and no one is immune from criticism. And, #4, reminds us that while words may be "legally permissible" does not mean they are also "morally permissible". Here, I'm reminded of my unease when J., in first grade, brought home an alphabet worksheet referencing "Eskimos".