I would not shoot a turkey off the roost.
With that said, I don' t expect anyone else go by my standards, if what they are doing is legal.
I think in the situation that Buckalley described his brother was somewhat new to turkey hunting, only taking a single jake before. I think that some people start out really wanting to just shoot a turkey but as time goes by and they are successful a few times, their attitudes and values change on what is ethical or sportmanlike.
I strongly agree that it is more fun and exciting to call in a gobbler and that should be something that we all WANT to happen every time.
As long as it' s legal and safe a turkeys life is taken, and we MUST respect that. I am not sure the turkey would choose either way... JUST MY OPINION.