Facebook feels like a hall of mirrors where people share their views and moments based on what others are sharing. What we have now is a culture of buzzfeed articles and witch hunt movements that make a lot of people afraid to be human. see a lot of one-upping, political rants, humble brags etc. I like HN and Reddit for the authenticity.
Even instagram is breeding mental instability in millions of people around the world. It may not be you or me. It’s a real phenomenon.
That happens in authoritarian regimes where blasphemy against the official truth can mean jail or execution. But even in democratic, liberal societies going against the "right way of thinking" can get you in a lot of trouble.
Edit (accidentally sent before finished): it's reasonable that hypocrisy increases when you share your opinions with the whole world (potentially) instead of a like-minded circle of close friends.