The Busy icon is a great way to stop the annoying constant RMT tells, but it keeps out everyone, including your friends. Could there be a way to make a "Friends only" icon, which would allow your friends to talk in tell, HOWEVER, also program it to where people cannot "befriend" you while the icon is up. This would stop RMT from sending "Friend requests" and would allow you to still have conversations with people who you may want a private conversation with.