if I were in line and a little boy in a very practical way told his mom "don't be rude, say hi" I would think it was so funny, but obviously the mom has her job cut out for her...it would seem like to me what my grandmother would call "a boy who was born a little man".

Leadership skills are important and they don't always come off so well on kids, and annoy many adults, but given the right direction they should be useful someday.