There's no such announcement that the server's having troubles or likely to collapse anytime.
So many of them aren't even aware of it.
Like "who knows, it's been up running for 2 hours straight, maybe it can stay for another 2"
I just don't like how the devs keep a lot of information way from us users or keep us not informed, like what troubles we are facing, what changes they've made to the live server (They don't always let us know everything).
What I mean is, if the servers have been unstable for a few days, then people should take it as a hint that now is not the best time to pop all your good medals and grind. It would rather be better to sit back for a few days, or a week, and see how the server is behaving then.
Problems cannot always be predicted, so I can understand them not giving the users an announcement when the server is about to crash; it is just not possible to track.