I have to agree with whomever said it earlier. The Drone represents the worst in us. The fears and the wants. The deep desires that we keep locked up inside, that at anytime may manifest themselves.
Take me as an example.
The me that is normally here.
I represent the goodness, I have do have impure thoughts, but I do not act on them, I have learned to control my urges.
Then there is the other guy.
He represents the darkness, lets call it the drone. The Drone, from what he has communicated to me, would act on all his thoughts, even the dark ones. But, seeing as how I only seem to lose control when I am alone he can't really do anything to harm anyone physically. But he can still do emotional harm if he has a way of communicating. Kind of like what the Drone did to Ripley near the end of Alien. Killing everyone, to leave her with nightmares.
So by my understanding, everyone has the goodness, and the Drone inside of them. They might or might not be able to control both, but that is what makes us us, and the Aliens alien. They are completely different. Think different. Hell, we don't even know if they shit.
Well, that is the end of my rant.
If you have any questions please ask.