I remember during physics class in school, they used to teach us, "Friction is a necessary evil". I feel the same holds true for social networking and in a sense the mobile phones too.
Computers and mobile phones were made to make our lives easier. We should remember that.
These tools are for our convenience first and foremost then others.
One should not let oneself become the reason for someone else's time-pass and should focus on what one wants.
Facebook is great for communication and interaction but one should not let it take over one's life.
As long as they are only a part of one's life.
I recall a joke floating around some time back. "Mark Zuckerberg is the only man in the world whose mother tells him to focus on Facebook and Whatsapp". We should mind it.
The joke is on us.