Mr. Not-Doctor-Doctor has called himself “Doctor” since the day he got his PhD in Organizational Communication or Western Culture.
In the real world, the only people that are called doctors are actual doctors. Don’t make people call you “Doctor” unless you can perform open-heart surgery. Don’t sign your emails and letters with “Doctor” unless you can take a bullet out of someone’s shoulder.
When someone passes out on the plane and the flight attendant yells, “Is anybody here a doctor?”, we don’t need you jumping in saying, “I can help organize a staff chart!”