Facebook - why do you talk with someone on his wall, instead of over PM?

[mruser]

<p>clearly, the justification for posting in a public wall type forum is to show off, as I illustrate in a wall post to my friend jim from a couple months ago on this topic:</p>

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is the point of jim’s wall to write something for jim to read? or is the point to write something for jim to read and have everyone read it too?</p>

<p>while you [the reader] are thinking about that one…</p>

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<p>jim-
thanks for the working lunch today. hopefully we’ll run into mischa barton again. that was pretty random…

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