Rule #12: A prophet can't lose predicting disaster.
Speaks for itself. You might note that horoscopes neatly sidestep this by telling folks what they can or should do. No fatalistic predictions, just you failing to be exceptional enough so it's all your fault when the stars give you a once over.
So, a good corollary might be, “If everyone gets angry at your disastrous predictions, predict it is their responsibility to prevent disaster.”
If you are a prophet who can see the future, this is still helpful info because even the truth needs a good angle if you want people to believe it.