Well out here, one of the best hunting ranches around was just closed to all hunters, because a man saw what he thought was a deer atop a ridge some 450 yards away. He shot, and it lumbered away. Later, it turned out to be one of the rancher's calves.
Even in other parts of the country, this is a big problem. Some owners of private game ranches require all hunters to qualify their marksmanship before they can hunt. Other landowners are saying no entirely.
I don't have a problem with a hunter shooting a game animal out to 400 yards. Beyond that, to me, is unethical. In my opinion, before a hunter even thinks about taking a shot like that, their groups, from natural hunting positions need to be 1.5 inches or smaller at 100 yards, and still under 3 inches at 200 yards.
Every bolt action rifle I own can and has shot groups of 1 inch or under at 100 yards. One rifle, a Remington 700 ADL synthetic chambered in 7mm Remington Magnum, produced two three-shot groups of 1-3/4 inches at 200 yards from a benchrest. I have lot of confidence in that rifle. In hunting, its never even made a 200 yard shot. I'd shoot a large buck or a big elk at 400 yards IF I felt comfortable with the hold. But I wouldn't ever shoot farther, because that just isn't ethical.