I don't think blockchain technology has anything to do with the facebook scandal. I don't even think that there is any sort of connection between both of them. Actually facebook has had a rapport that was formed over so many years. And the recent news of the leakge of the personal data of the clients by the facebook was a big shock for the universe. it was hard to believe at first, but now that we have been acquainted well with the facebook scandal, it has shattered  all the well built rapport in our minds. blockchain is a public ledger that has record of all the data pertaining to the bitcoin and other crypto coin holders. Some of the ICOs also make the use of our personal information, it might also get leaked somehow. But until now there are jo cases reported, neither the blockchain has such a rapport!!