I am amazed at how often I see a reply to an otherwise interesting article that veritably screams, “Duplicate Post, you idiot!” pointedly implying—or sometimes even saying outright--that the poster has violated the most sacred trust not to duplicate posts. The tone of these reminders suggests that there may be no greater sin against common decency and the de facto protocols of the forum with the possible exception of failing to post a picture of Ann Coulter when she is mentioned on a thread. (I’m sure someone will be happy to oblige, even in this case.) When I log on...