The"greatest good" does not imply the greatest exploitation. It is apparent that important minority rights are recognized in various aspects of our national life. We do not have juke-boxes in the Library of Congress, peanuts are not sold in the aisles of our cathedrals, cigarette advertisements are not displayed in the National Gallery of Art. The sanctity of a church, a gallery of art, or a great temple of nature depends upon a concept of appropriate use.