Do you mean, for example, if a PFer had a biography written about him years from now, and the biographer had access to all his posts, even the goofy ones in GD ? Then the biographer may know some https://www.physicsforums.com/showthread.php?t=217449".
To me, it would make him more human. Just think of Feynman's biography...it was all the stories of him being funny, irreverent, and light-hearted that made him so appealing to the masses.
Or, of course, it could be the case that his electronic trail shows clearly that he's just a jackass.