As it happens, I've known Blevins/Publius for some time and am irritated on his behalf. Whelan's motive to "out" him appears to be pure pique. While Lord knows I am certainly quite snarky in my blog persona, it seems to me needless assholery to disclose someone's real name when blogging under a pseudonym for no better reason than you are just looking to fuck him up because he annoys you. Because there really is a difference between telling someone you think their ideas are stupid and going out of your way to make their life more difficult.
Update: Publius says Whelan has apologized and he is moving on. Well, he doesn't need me to stay pissed for him.