I always hunt public lands and do my very best to get away from the crowds, I almost never even see or hear another hunter, I do however think it has been easy to tell the difference between a hen talking and another hunter calling to a gobbler.
I have never gone after another hunters turkey, one it's unethical and two I prefer to live another day.
When I first started out I hunted Ft. Carson, lots of birds and crazes. I had my decoy shot from a road shooter illegal here, (DOW came out and I was a legal distance from the road) 3 times hunters came into my setups to intercept the gobbler coming in and two of those times it was the guy that shot the hen of the roost.
I left that dangerous place and never looked back.
I agree if something is legal it's legal but legal ain't always ethical.
Roost shooters
Get away from other hunters and give yourself a chance to give the turkeys a fare chase.
Your in control of your choices not the other hunters in the area, If you found one you'll find another.