I'd be worried about wounding and losing a lot of animals. What's next, sharp rock and loin cloth season? You can kill a deer with anything but not everything will kill a deer quickly and cleanly. When hunting was necessary for survival, people used every advantage at their disposal to bring the animal down quickly. I'm not saying that we all need to use high power rifles with laser sights, but I think there is probably a line in primitive hunting that we shouldn't cross. I can just see a PETA person taking a picture of some guy in a loincloth, straddling a deer's back and strangling it with a piece of vine. Maybe spear hunting isn't across the line, but I wonder.