Instead of "objective standards of morality" which may or may not exist (different countries and cultures, etc.), how about using "strong preferences of the community". That way your point still stands (as I understand it), but any discussion on morals risks getting bogged down by unrelated hot topics.

It is a little vague on who is part of the community and who is not, but usually a good enough definition is easy. For a beach, maybe consider those who care and live within a day trip distance.