I've elucidated about this somewhere before, but I view this perspective as a little too cynical for my taste. I think exposure to public perceptions shapes people into more civil individuals, and this can translate to private life.
A good simple example is the way people tend to tidy their house before having guests. The cleanliness isn't "false" by most people's view.
Edit: Another perspective is that people use the company of trusted friends as a staging area for shaping their own nuanced positions. It's safer.
Again, totally agree. Cognition is social. Our social context can inhibit or boost our impulses. Starting with our inner voice all the way to global broadcast.
A good simple example is the way people tend to tidy their house before having guests. The cleanliness isn't "false" by most people's view.
Edit: Another perspective is that people use the company of trusted friends as a staging area for shaping their own nuanced positions. It's safer.