I think it would be awesome if users really did delete their facebook accounts if they thought these actions crossed some line. But the article cites ~50,000 #deletefacebook mentions. Come on, 50k hashtag shares is evidence of "Users Abandon..."? it then proceeds to document case studies of people leaving. The article title would imply that users truly did see this action as a last straw and are leaving in droves, and it seems that is the narrative that the writer wanted to write about.
Is that truly happening though? I'd love to see the data, but I don't think they will delete their accounts. Why would the writer elect to write an article fitting a narrative for which there is little data? Surely, the more interesting article would be "Are users deleting their accounts? Why not?" That I would read and find interesting.