I flew with a guy one time who was adamant that his way was the right way. When I pointed out where his "procedures" differed from the company's, he informed me that the company and Boeing were wrong and his way was the right way. All because he had an Aeronautical Engineering degree from the AF academy. It finally came down to, "Look. It says Delta on the side of the plane, and Delta on my paycheck. I'm doing it Delta's way. If it was your airplane and you were paying me, I'd do it your way."