When I was growing up, I called adults Mrs./Mr. [last name] with the exception of my two babysitters, who insisted on being called by their first names. As a teenager, I always called my friends' parents "Mom" and "Dad" and my friends did the same with my folks. It was less formal that Mr. or Mrs., but was still respectful.
ITA about "thank you" Missyboxers. Common courtesy isn't so common anymore. I was reading an article on dating a while back where they asked men what could make them not call a woman for a second date. The #1 response was not saying "thank you" at the end of the date.
I love the mohawk, Unk!