“William”, the 23 year old male blogger behind You’re Not Helping had claimed to be several people, including an older woman (whose alleged presence he tried to use as a license to treat Ophelia Benson in a sexist manner). Earlier tonight he confessed to being just one blogger and to writing comments under pseudonyms to manufacture the appearance of greater support for his posts than he actually had.
He has subsequently closed off all access to the blog unfortunately. You can get choice examples of his rather pathetic sock-puppetry at Pharyngula and the Oedipus Maximus deserves a ton of credit for his investigative work which exposed the fraud. Here is the other best investigator against the site, Greg Laden’s account of what happened.
[On Edit: Be sure to check the comments below this post for a qualification from Greg Laden and for my own reflections on You're Not Helping's tactics, his downfall, and his legacy.]