I recall an incident back in the 70s when a surprise early morning callout (minival maybe?) found a crew assembling to fly with a captain who was still distinctly "under the weather" from a very heavy late session the previous night. The crew tactfully pointed out to their captain that he obviously had a heavy cold and blocked ears, so he should declare himself unfit to fly. Said captain wouldnt take the hint, so his crew downed navbags and refused to fly with him
Result, a huge bollocking from the boss for the captain and none of that "squadron loyalty" crap mentioned by wensleydale and vascodagama for the rest of the crew. Said captain learned his lesson and went on to a very successful RAF and civilian career.