Ethics, as regards hunting methods, are a vague and moving target. As times change, so do peoples ethics concerning hunting methods. In my grandfather's day, using a tame hen turkey as a live decoy was accepted by many. Archibald Rutledge, the first poet laureate of South Carolina and a great outdoorsman, wrote in his book Hunting and Home in the Southern Heartland about sending out a man who lived on his plantation to kill turkeys for a big holiday meal. The method he employed was to put out a string of corn, and build a blind in line with it. The idea was to kill as many turkeys with one shot as possible.
I'm reading a rather sad book right now entitled A FEATHERED RIVER ACROSS THE SKY by Joel Greenberg. It is a chronicle of the passenger pigeon in N. America and it's flight to extinction. Trust me when I say we've come a looooong way in conservation and ethics in taking game since the 1700-1800s.
SRH