Why?
I enjoy it.
In my opinion, the object of 'social media' in general, and Facebook specifically is to get as many people as possible to voluntarily 'gather' together in the same 'place' and voluntarily reveal their innermost thoughts, as well as their personal information. It is structured so as to lull 'the masses' in to a sense of false security so that they will voluntarily reveal virtually everything about themselves, their families, their friends and their acquaintances.
The information gathered can be used at some time in the future by our totalitarian government to separate those who are guilty of 'double-plus-ungood' thought crimes from those who are 'only' guilty of 'regular' thought crimes.
Thought crime enforcement will be much easier with people literally turning themselves in.
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And yes, maybe I DID just get a newer, more powerful tin-foil hat - so what?