My two cents on David's activation. (Mild Spoilers)

I saw part of the opening to see if there are any opening variations for Fox and Scott Free (Yes, I am a stickler for those types of things) and the way the lettering came up on the screen. I have yet to see the movie, I will see it, I saw some clips of it and I know how it ends...

I think David came into the world, with a good nature and ready to serve and be a companion to Mr. Weyland, but his harshness and objectification in response to David's curiosity started slowly corrupting him instantly. (Like the black goo) I have reason to think that Mr. Weyland and Vickers were unnecessarily abusive to David and that gave him all the reason to carry out revenge and lash out on humanity for the way it is, we got the Xenomorphs out of that.