I think referring to people by their last name w/o a title like you describe is the "proper/formal" way to do things. It's certainly how I see people referred t

I think referring to people by their last name w/o a title like you describe is the "proper/formal" way to do things. It's certainly how I see people referred to in traditional/conservative forms of publishing (for instance, non fiction business books unless the author really knew them on a personal basis)