Hm, as far as hunting goes: it is necessary.
I'll use Sweden as an example. Most large predators have been hunted quite much are their numbers are small. The elk population, being little threat to humans in general, haven't been hunted because of an irrational fear that seems to be innate in the human animal.
The elk population thrives. Actually, it sort of explodes when it's not hunted. It grows to such a large population that it's not sustainable long term - effectively, it's doing the human thing of overdoing something and therefore killing off future use of an item or food source. Combine with a timber industry that under law msut replace the trees they cut down and you have a problem. The elks love these ypung saplings, and if there's too many elks around, they'll soon die in huge numbers due to limited food. And the saplings won't become trees because they'd be consumed by now dead elks.
So, you have the hunters. A group of old guys with guns. Some cannot shoot worth toejame. Most aren't out strictly to kill elks. It's a social thing - you're out in the woods with your freinds, in touch with nature. You're in touch with the caveman inside of you (and, we DO have this trait still in us - might be less prioritized than other instincts, but it is there).
It's not a fair match at all. There's nothign particularly manly about sitting for hours on end waiting for an elk to come by, and then line up at 80 meters and shoot it with a hi power rifle with a scope. But, it is for the hunter a thrilling and rewarding experience.
Hunters eat what they kill. Elk meat is delicious. Compare a pig or cow that has lived its entire life on a few square meters, with a monotonous life only interrupted by getting a big bolt to the head, to that of an elk that has lived in freedom.
For that reason, I prefer eating meat from animals that have been hunted, instead of meat from the meat factories.
Regarding the grizzly: if it was self defense, the guy did the only thing he could have done.
I deplore the practise of hunting carnivores - their meat isn't good to eat. To hunt them for their hide is just Golly-geened ugly. Predator illustrates it nicely. That's just an ugly macho thing where some men and women think they're all macho and hard for sneaking up on another animal and blasting it with a rifle. Nothing macho about it: doing it with a knife would be, but not with a rifle. Bow hutning seems to be the best to me in terms of nature experience, but that's against the law here I think, because there's too little killing power in a bow (or rather, it requres too much skill for the average hunter).
Hunting is necessary, and it's bloody much better than raising cattle and slaughtering 'em.
