"It's a helluva thing, killing a man. You take away all he has, and all he's ever gonna have." Eastwood

The threat of lethal force deters crime. Anything less would be uncivilized. I don't use a taser, a stun gun, pepper spray, mace, or a stick for the same reason I don't bring a knife to a gunfight. An awful lot of violent crime is committed with a firearm, so I at least want to match the threat. Wouldn't you agree? At least that seems to be the most effective approach I've heard of.
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)