In my troop, the scouts call us leaders, scoutmasters, asst. scoutmasters.. by our first name.
Scouts parents also call us by our first names.
We are in a somewhat small town with a small troop.
We Scoutmasters both live out of town, and neither of us has a son in the troop. It's our old troop when we were scouts. I got my Eagle, and stayed in as ASM. That was 9 years ago. My assistant, earned his Eagle, didn't like the SM or the Committee at the time, or how the troop was being run, so he left for a few years.
We do have all the scouts call other adults in the troop with