Many of my friends have termed Facebook 'Boastbook' as they say that they only go on there to show what their children have been doing (only if their children have been doing exceptionally well of course). Similarly I load up pictures of my nights out and 'Instagram' my nice meals. I guess this is all some form of proof or affirmation that we are living life and showing other people that we are interesting and not boring. Although as we all know, posting too often probably suggests the opposite.
The difficulty we had when redesigning Blurtit is deciding which human traits we wanted to appeal to. We are keen for people to share knowledge and be helpful, but not to shout others down or make people feel silly or stupid for asking the question they have. It's also important that people do form a community, as without the sense of others listening and being appreciative, we would end up with an online version of lots of people in a room shouting about what they know, but with no one listening to each other.
Undoubtedly, this is how all online communities start, however, I fell Facebook especially has fallen foul to breeding jealousy and envy and has become more and more about showing a false side of your life. Overall it breeds attention seeking behaviour. Many people I know who get hundreds of 'likes' for posts, purposefully post such offensive content, it affects how you view them in real life, although I am yet to see this side of them in actuality.
As the article you refer to states
"Let’s choose community. Let’s stop comparing. Let’s start connecting"
and I completely agree with that philosophy, and really hope that is what we manage to achieve on Blurtit.
In general, I feel the narcissism of Facebook can be too time consuming and very addictive. Should you wish to monitor your time, try www.rescuetime.com. A friend of mine used it and after looking at the results, came off Facebook entirely!