The question is, "How do I kill them all most efficiently?"
Loyal readers, I'm sorry I've been gone so long. I've been busy working, taking classes, traveling, sharpening my weapons, etc. But I can see my absence has allowed a certain slack in the Zombie Awareness Community.
The Blog io9 has actually published an article entitled, "When is it okay to kill a Zombie?" You can access it right here: http://io9.com/5884288/when-is-it-okay-to-kill-a-zombie. Don't be taken in by these moral relativists: zombies are dangerous and must be exterminated as quickly and cleanly as possible. the only moral obligation you have is to determine that your target is, in fact, one of the animated undead. And believe me, I know from long experience, that is usually not hard to determine.
Do not waver in your purpose, friends.