One more time, dreaded, hated, deluded guest: do you realize that these 'monsters' you are describing are our neighbors, our friends, our family? These are human beings- just how many human beings do you know that are soul-less and evil? If you know even one, I hope that person is locked up. If you know three like that, you're hanging out with the wrong crowd.

Even in science fiction, scenarios must be plausible. I suggest you entertain each other with more Can You Top This story lines.