Shoutbox

This kind of thing won't be added to Messenger Plus! Live as it is unreliable.  The "leaves conversation" DOESN'T mean that they have closed the chat window, it just means that the conversation has been inactive for a period of time and so the session has been closed by the mesenger servers, it's got nothing to do with opening or closing conversation windows.

It's been quite a while since this feature was possible since the messenger protocol changed