Lee Marvin was one who stood up for the crew:
Marvin took a lead actress aside once on set and said: "We’re the stars of this movie. If we allow them to work us so many hours, we’re not the ones that get hurt. It’s the crew. We have to stand up for the workers, for the crew, and we have to refuse to work these long hours. We have to stand up for the crew.’ And that had never occurred to the actress. Which was a huge lesson from Lee Marvin.