Not at all.The comments like "I find it rude that you would disregard the adults preferences in favor of your own" just get me. Sounds like you're saying that we're ignoring your "preferences", but it's ok for you to ignore ours?
If you want my child to address you as Mrs.Last name then that's how she will address you, it would be rude not to. I respect your desire to be addressed that way.
What I don't understand is if I would like to be called "first name" why not have the same respect? Essentially you are teaching your child to disregard another adults preference.
Bottom line, I think an adult should decide how they would like people to address them.