I'm not quite sure how that works for you but generally speaking, social life is all about privacy - yours and more importantly others.
You don't share everything to everybody or you end up being the sucker that gets the news late or not at all because he can never shut the fuck up.
Even if you are careful about others privacy, you can be a victim of the carelessness of others. As an example, we have friends on FB we can no longer read any news due to them friending people careless about their privacy wishes. Everything now is coded messages like "Worked better than expected. Next step tomorrow at 10", so you must have had a conversation with them outside of FB in order to know what the fuck is going on - which is the reason why we had FB in the first place.
I value my social life, and I value being able to actually communicate with my friends.
I have made a conscious and rational decision that my social life is more valuable to me than my privacy.