My grandson, when he is with me, calls clerks in stores, etc. "ma'am" or "sir." He forgets and says, "Hey..." then I remind him. It doesn't hurt a child to at least learn good manners; whether they choose to exhibit them later in life is their choice, but at least they know better.

If we wanted to be fancy, my Rog and I could be the de La Frances because of some fancy-schmancy ancestor of his, but all it means is "of France" so...duh.:-)