For example:
Player A is hidden.
Player B is not hidden.
Player B wants to whisper something to player A and uses /whisper playerA
Player B then gets the message:
Auto-whisper is enabled. All messages will now be sent to player A
But when trying to type something while in the whisper mode you get the message:
Player "Player A" doesn't exist !
Alltho he is online but hidden.
Could the ability be added to chat with hidden players? Or maybe just the op's can whisper to each other whilst hidden?