If you type a word in the buffer that is on the auto-mute list, you get a pop-up box warning on your screen that says something like "Continued use of profanity will result in loss of radio privileges." And what you typed is not transmitted. If you type it again within a certain amount of time ( I think) you get muted and get a message box that says you have been muted for use of profanity. Once again, the text is not transmitted as far as I know.
