Well I'm glad someone else feels that way too. When I came here to the States I was horrifed to discover that people think it is "friendly" to address total strangers by their first names. At first I used to put up with it, but now I am a grandmother and I speak up. When a 19 year old doctor's office assistant or a bank teller addresses me as "Olwyn" I simply say "that's Mrs (last name) if you please". My first name is reserved for my friends.
Olwyn Mary in New Orleans.