What a fantastic idea, phantom. Here's a better one: if it's the smartest, greatest, most logical, and best thing to sacrifice your innocent self for the good of the village, why don't you volunteer for it yourself?
EDIT: Oh, and now that I think of it more, that's a terrible idea. No offense or anything.
Let me explain why your idea sounds wolfish to me:
When we cast our votes today, we have a disturbingly high chance of slaughtering an innocent. As bad as that is... if somebody
volunteers to be slain, then we GUARANTEE that we slaughter an innocent! Why in the world would we want to make absolute certain that we are killing a non-wolf villager? What the heck is the point of it? It will leave us back to square one, only tomorrow morning, instead of one villager slain by wolves and one villager
maybe lynched, we'll have two dead innocents, and the only new information we'll have is who the werewolves decided to kill. We're going to have that no matter what, so why, I ask, do you think it's a good idea to make absolutely certain that we kill somebody innocent?