Elon Musk Deletes Own, SpaceX and Tesla Facebook Pages After #deletefacebook
I don't work at FB and I don't have their shares either . But to me this is looking like punishment beating because it is linked to Trump victory at the polls. We all know that FB is in the business of selling data in one form or other. And we also know that FB is human and is subjected errors and mistakes. 
But deleting FB , leaving FB , pulling adverts from FB may not change the fundamental.