If a cat (or fox or any other predator) takes one quail in one year, that's one less quail these manly men can shoot. So they want to knock off the competitors. Of course, some people simply hate cats and others wish to kill for the sake of killing -- they are the type who try to run over an animal when it runs across the road in front of their car.
I have friends in the country who let their cats outside, uncollared and unsupervised. I think that is unwise. I've been told that they are afraid that a collar will catch on something. I keep my cats indoors, but over the years there have been escapes (brief and permanent) of cats without collars. Some think that all of these cats are fair game.
"If a cat (or fox or any other predator) takes one quail in one year, that's one less quail these manly men can shoot."
Don't kid yourself or us a feral cat kills and eats one quail each year and survives. A cat on the prowl is hunting, whether it is feral or roaming. They will miss some stalks. Others will be on nests of five robin fledglings or 14-16 in a Bob White quail clutch.