Grandstanding isn’t what it used to be, not in our media-saturated age. On Tuesday night, the author, blogger and critic Dale Peck threw a mildly revolutionary literary event, outside the Barnes & Noble in Union Square. About two dozen people, nearly a quarter of them reporters or photographers, came to hear a speech by Mr. Peck, a founder of the publishing collective Mischief and Mayhem and a known rabble-rouser, and a reading by Lisa Dierbeck, another Mischief and Mayhem founder and one of its writers.