What a joke, Facebook is the biggest enemy of privacy, people who use it should realize that their data is being sold constantly, sometimes to advertisers and other businesses, sometimes to regimes that prosecute opposition. Blokchain will do absolutely nothing in this scenario, even if it somehow managed to work in this context.
Actually I don't mind if Facebook is selling data about my preferences in books, movies, food and other stuff, but I really doubt what you said in the selected text above. Could you please provide more details about that?
I don’t think that facebook sells information (as far as I know) but they don’t particularly deprive the public of personal information of its users. It’s practically pretty open and vulnerable, but it’s not likely to be a marketplace of information. We have ourselves to blame for putting too much personal information in social media when it’s not even necessary and don’t even bother to take the measures to protect ourselves. While Facebook has the responsibility, the users should play a part of it as well.