If you have young ones tearing at your flesh, don't kill them. Herd them toward your enemies. If you have emotions tearing at your mind, don't stifle them. Herd them toward your goals.
OK, if a prisoner acts up, kill'em. If they start liking the place to much, kill'em. If they insult us, kill'em. If they kill another prisoner - \ I know, I know, kill'em... No! Try and recruit them, we can use more good men.