My SO and I co-coach a softball team for kids, so we get used to calling people by their last names. It's not a big deal in this culture. Sometimes, but always with Mr., Mrs., Ms in front of the last name. This is how I was raised to address people. You didn't call adults such as parents, teachers, etc.
Old habits die hard.
I say it the other way around. I said sometimes, because in high school and college, I did it all the time. I haven't done it in a long time, though. My mom, aunt, and I decided to ride the sky ride, so we could maybe get a better view of my dad, uncle, and sister. After we got up in the air, I noticed they were also on the same ride, in the car right in front of us.