I think your first instinct, that children should address adults in the manner in which the adults ask to be addressed, is absolutely dead on.
I agree that it is important for children to address adults as they are told.
It should be up to the child how to address an adult.
I didn't buy it in the end because I knew it wouldn't prove to be very useful.
Children entertain themselves outdoors.
You can get them out of school at any time.
They had strategies to deal with the improper payments.
Why should anyone outside Main Street worry about that?
There is no shipping service for things and you have to carry everything home on your return flight.