As a kid I never called anyone except for teachers Mr. or Mrs. So and So. The concept makes very little sense to me.
Now that I have children I find people (like my child's teacher) calling me Mrs. MarriedLastName as well as other children referring to me as such.
With the teacher and people I see regularly I always or most of the time say "oh no please call me....." which works great. But with kids- some parents look at me funny if I say the same. I understand that some people believe that titles and such are a sign of respect- that is great- but to me you should respect people based on the fact that they are people not on the idea that they are older. Respect greater than that is earned- and not by having a birthday- but by a thousand other things.
My children call their teachers Miss LastName but other adults are usually referred to on a first name basis. It does not mean they respect anyone any less just that titles are a bit superfluous.
What do you think?