I only know of 2 cases where I know for sure that it happened, although I've heard rumors about more. It's not going to be one of those things where you run around yelling about it, especially if you succeeded (after all, flexing on your management that you did it is likely to make your management unhappy).

One case someone succeeded. The other case some other person resigned.

Sorry, that was clumsily put - what I meant was in one case person A got what they wanted, and in another case not involving anyone from the first case, person B didn't get what they wanted and resigned.

If they don’t quit, the next time they try it, it won't be believed.

I’m more interested in whether it’s interpreted as an actual ultimatum, or just an emphasis.