Ewww, that would be really, really cruel! Poor vampires! XDD I mean, they are evil and everything, but nobody deserves that.

(I think that they maybe need to eat the object to make it disappear? Or for the object to be implanted under their skin, like a chip, maybe. I don't think, given what we saw in the episodes, that a circle of vamps all around could dust stuff in the middle. But maybe I'm forgetting something? The show isn't really consistent with these stuff)