OK, who around here remembers the late 1980s and early 1990s? Try to take yourselves back...picture it...all of a sudden there was this thing called caller ID. At first, very few people had it. Prior to caller ID, if you wanted to know who was calling you, you answered the phone. In between answering the phone and caller ID there was the whole answering machine call screening interlude (that was something we did before voice mail. You actually heard the message while it was being left! Good times) but soon enough we moved on to a magical device that told you who was calling when the phone rang.
I thought those people who needed to know who was calling them before saying hello were, frankly, a little paranoid. But OK, so, then the next thing happened: people on the other end were outraged! How would kids spend hours prank calling their neighbors, how would adolescents stalk their boyfriends and girlfriends, without anonymity? So they retaliated with a new invention: you could BLOCK your number on caller ID. Ha! thought the newly blocked callers, triumphantly. I shall save my privacy! A little paranoia from the other direction.
Or maybe, those calls would not get through, because the first set of paranoids quickly upped the ante by refusing to accept blocked calls. Maybe you dialed someone's phone number around 1993 and got a message that you could unblock your call for just this number by pressing some button or other. The paranoia was flying fast and furious, now.
And, then, ten years later everyone got a cell phone and checking the identity of callers became so automatic that all that early 90s paranoia became just ancient history for the kids today -- until it got transferred to Facebook.
The Facebook news feed is the new home for paranoia. "Facebook has done it again!" a friend's status will warn you. "Copy and re-post this so you can warn everyone your privacy settings have changed." There are blocking of friends, hiding of posts in news feeds, and the latest bit, an attempt to not be left in the dust by Google+, of deciding post by post whether to share it with everyone or some people or some other people.
Yet, it's Facebook. Facebook! The idea of being paranoid about one's privacy while on Facebook remains a marvel to me. But then again, I clearly don't understand these things, as I never once in my life shelled out one red cent or spent one minute of effort on caller ID, call blocking or not accepting blocked calls.