I was always raised to believe that you you should only kill an animal if you need it for food, not for a trophy item. Anyone who would shoot an animal just for the hide or antlers needs shot themselves. Fair is fair after all, let the deer shoot you so he can mount your head on the wall and leave your body on the side of the road. Legality aside, I have no issue with using any method you feel is necessary for a kill, so long as it is respectful, quick, and safe for anyone or anything not intended as the target.