Can we have an option which we can set (say something like chat command /afk) that when we are whispered in AFK mode it sends a message saying this player is away from the keyboard.
The online/offline on friends (and guild if it ever works again) is nice but each time we go get a drink/munchies/toilet break etc i think most players like me do not bother logging out so a way of showing that we are not currently at the pc would be nice (and polite)