Comment 3 for bug 1088029

My feeling is that this is a Messaging Menu feature request. I think it's a reasonable idea, but this should be forwarded to them for consideration. I'm including them in the affected projects list for this ticket.

I should also note that GNOME Shell has a solution to this problem. In the user menu (top-right corner), there's a "Notifications" switch. Turn it off, no more notifications.