As I began to read this thread I was disturbed to see the general level of intolerance and self rightousness about correct etiquette. Did you ever stop to think that sometimes there is a very good reason for a person not removing their hat. Some years ago a friend of mine was suffering cancer and because of the chemotherapy treatment her hair became straggly and whispy and much of it fell out. She was highly embarrassed about this at a time when her spirits were not that high anyway. She took to wearing hats and scarves (partly because she didn't want to be the subject of rude and intrusive attention). I guess what I'm trying to say is, please don't condemn someone's actions unless you know the full picture.