Ask Slashdot: How Would You Deal With A 'Gaslighting' Colleague?

An anonymous reader writes:
What's the best unofficial way to deal with a gaslighting colleague? For those not familiar, I mean "bullies unscheduling things you've scheduled, misplacing files and other items that you are working on and co-workers micro-managing you and being particularly critical of what you do and keeping it under their surveillance. They are watching you too much, implying or blatantly saying that you are doing things wrong when, in fact, you are not...a competitive maneuver, a way of making you look bad so that they look good." I'd add poring over every source-code commit, and then criticizing it even if the criticism is contradictory to what he previously said.

The submission adds that "Raising things through the official channels is out of the question, as is confronting the colleague in question directly as he is considered something of a superstar engineer who has been in the company for decades and has much more influence than any ordinary engineer." So leave your best suggestions in the comments. How would you deal with a gaslighting colleague?