> This is not a contradiction. Someone with privacy has the right to decide what they do and don't want to share publicly. Like you, I am concerned by how Facebook is used, and some of its societal implications, but this sort of extremist attitude helps nothing.

What you call an "extremist attitude" I call "info security common sense". Companies like Facebook are well known to lull their users into a false sense of being in a "safe, governed social utopia" all while profiting from vast amounts of data both explicitly provided by users and implicitly provided through data analysis. Anyone even remotely close to fields like infosec, cyber security, or data engineering know that Facebook is quickly becoming a giant spider web for its users. While I agree with you that an extremist attitude is not helpful, it's come to a point where I just know too much about the background of companies like Facebook to simply ignore these issues.