A Scout is courteous. A Scout is polite to everyone regardless of age or position. He knows that using good manners makes it easier for people to get along.
Bad manners are cool, they always have been. It has always been cool (at least to some people) to rebel against society, to challenge expectations, to be an outsider, a nonconformist. (Funny that nonconformists mostly conform to certain manners of dress and attitude.)
But courtesy is not simply good manners, one may have good manners yet be extraordinarily discourteous. Courtesy is a heartfelt expression of respect and consideration. Respect for the different ways we express ourselves and consideration for our innate desire to be understood, to belong.