Somehow one of my monthly reports got passed up the line. The head of all of this was a female VP who was pushing this hard and had been given tens of millions to fund this and that. My report basically said "This is happening, and isn't going to happen, and here's why not."
At the time, my boss' boss was a very good guy and he grabbed me at lunch and said "DO NOT RESPOND. I will handle it. Don't write this stuff any more."
About two years later the whole thing quietly "went away", and the VP lady was promoted. I spent 3 years of my career working on "compostable polymers" for no reason.