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<p>I wasn’t arguing that they SHOULDN’T be posted on Facebook walls - I was inquiring why they are posted on facebook walls even when the rational agent is sometimes better off exchanging such info via personal messages. (by means of a Devil’s Advocate argument - that was my intention - I should have been more explicit about it)</p>
<p>By the way, I often make inquiries of people’s attitudes/behaviors by means of null hypotheses/devil’s advocate - this has the tendency to provoke the most direct responses to the object of my curiosity</p>