Facebook admits to doing large-scale emotional manipulation of its users. They published a 'scientific' paper where they showed that they tried and succeeded to make 1 group depressed (hundreds of thousands of people), and 1 group feel happier (also hundreds of thousands of people).
They psychologically manipulate people into depressions, on purpose.
Facebook is not "just" an extension of open society. Facebook is a specific powerful corporation that makes immoral decisions to emotionally control their users.