What about something like /anon or /hide, that will make your name hidden from searches. Won't work on your friends though, they'll still be able to see you. RMT just go down the search, not coming up on the searches may help. Message filter would probably be best, some way to turn off receiving /tells except by friends, and if you start a /tell to someone not on your friends' list, they can still respond if you are /busy, at least till you relog.