Above all, whether on set, at work in the office or in the field, at home, or in public, should we not remember to show common courtesy to others, irrespective of finding yourself in a less than desirable situation due to how you are treated, or due to some condition beyond anyone's control?
Remember that common courtesy is simply those rules of behavior that delineate outlooks for social behavior according to conventional norms within a society. It is that bearing of manners or social conduct that pertains to being polite.
Being Courteous to others is not only respectful to others, but it directly reflects on you as a person, the company you represent, and the company you keep.