Have you any idea how much time you are actually wasting looking at facebook? Me neither.
So I scrolled down the homepage just for fun, counting the posts and noting the number of them that were actually personal in nature, you know, something someone wrote or family pictures and the like.
I stopped counting at sixty-eight (even I have only so much time to burn). At sixty-eight, exactly seven of them were of the type I described in the previous paragraph. The rest of them were memes or links to "The ten worst fails," or the "Twenty best---" (whatevers, you name them)
Barely ten percent of the items were anything I would remotely like to see. And imagine how much more time is frittered away if one actually follows any of the links.
Like all technologies, it is not the thing in itself but the uses to which it is put.