Never thought of that mwp2paris, thanks for pointing it out.
But I personally do call the person taking my order Ma'am/Sir. Ive come to relieze if you treat the person with respect at the counter, your order pretty much is done quick and always with everything you ordered.
Addressing someone as Ma'am/Sir, doesnt imply that there in a position of authority, Ive grown up with the understanding that its a sign of respect.
And I wasnt saying we we're in a position of authority in the first place. What I was stating was I would rather not be called by my first name but rather Sir/Ma'am.