Ironically, it couldn't be further from the truth... just watch what happens when someone pushes back on what you've said or what another person wrote - look at how quickly we call constructive thinking as someone being judgmental, say "You don't understand me! So leave me alone!" or accuse them of being "a hater."
I like Facebook for its potential good, but I do think this graphic says something worth noting:
What do you think? Does being a part of an online social network mean you present a side of yourself to the world but hide the rest? After all, isn't that what most of us do in person?
"There is nothing deceitful in God, nothing two-faced, nothing fickle. He brought us to life using the true Word, showing us off as the crown of all his creatures." (James 1:16, The Message)