I like your idea, but I don't see it being added. In XI /anon was useful because it hid what job you were. That way WHMs and BLMs couldn't be bugged for raises/teleports/warps when they didn't want to be bugged. Here everyone has the ability to teleport and return, and death penalty is nothing compaired to other MMOs. /busy works fine right now because it blocks out tells invites and such.