@pzmyers It's a good question, and one I don't know the answer to.
I don't think it will be possible to kill Facebook entirely unless they are found so guilty of criminal activity that shutting it down is part of the sentence.
There's too many people on it, locked-in to them as a vendor. The userbase will probably shrink and skew older with time, but nuking it from orbit seems unlikely.
Maybe replacing everyone that works at Facebook with people that are more ethical would be a start.
@pzmyers just to be clear - after the #CamAnal story broke, I downloaded my archive and clicked the #DeleteFacebook button. I'd love to hear about a viable alternative that isn't actively subverting democracy as much as the next person.