> If you're not on the board of directors, the way you register displeasure with your CEO is to leave the company.
Or you write a letter to the board, those responsible for the situation.
Or you write a letter to the board, those responsible for the situation.
Update: In the largest newspaper forum of my country, there are now 2 posts out of 96, agreeing with SpaceX (but more on the basis that the employees' action was ill-advised).