http://www.bbc.co.uk/news/science-environment-22885969 Obviously, as a vegetarian, I wont be partaking of one but it would obviously mean less animals being butchered. Of course, people could just eat less meat.
I like my animals to suffer before I eat them. That rush of fear fuelled adrenalin they get when they realise they're about to die painfully adds a certain piquancy to the meat.
Ah but they don't know they are getting the bullet (or bolt) to the head, the slaughtermen stun them first and then apply the Coup De Gras. Now if you want your meat really fear fuelled adrenalin filled and tasty, Halal is the way to go.