"Shut Up, Stupid!"

My aunt told me the other day that she was reading a book to her five-year-old grandchild, and she was a little disturbed to find that words like "shut up" and "stupid" were used copiously in the book. She changed the words to phrases like "be quiet" and "silly," but it still bothered her that such words be used in a book for little kids. While words like "shut up" and "stupid" pale in the face of the really bad words, they're still not nice words. Do I use them multiple times every day? Most definitely. But the other day, when I was in front of a lot of little kids and was on the brink of telling someone to shut up, I made sure to say "be quiet" instead.