I don't mind the Convo Window coming to the Foreground
.. but, I would rather it come to the Foreground, Only if the person I minimized the Window on.... or left Focus of... Messages me back, rather than it switching to the very next person that Messages all the time one after the other..
it makes the window pop up way to often! & kind of becomes more of an annoyance.
Some users might want to leave themselves in a Tab where they know there won't be anyone writing a message anytime soon, just so the window doesn't pop up on them
... which is better than turning the script off & on