It's possible that you don't care whether your old college roommate thinks Ric Flair's birthday should be a national holiday. Maybe the fact that a co-worker adores a particular brand of potato chips does nothing for you.
And did you really need to know your cousin is lactose intolerant?
Yet in recent weeks, personal information ranging from the arcane to the surprisingly revealing has spread furiously across Facebook via a simple application many of us have come to know as the "25 Random Things" note.
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