It isn't as simple as whether the target was checked. In the two incidents in AZ I cited earlier the shooters were firing on legal elk. The victims were hidden by their camo and the surroundings so the shooters had no clue they were in the line of fire beyond the elk. I agree we have to be certain of our target and what is beyond it, but few hunters will refrain from shooting just for a lack of a berm behind the target. Add in the adrenaline filled desire to take the game. It is actually an argument for tree stands which are even more dangerous due to falls. Part of why I hunt with a flintlock and patched roundball is to limit the distance my firearm carries.