First, we've had excellent "Ask HN" submissions in the past which tried to discuss private startup-specific problems that a partner or founder was having. These discussions were timely and relevant, and we were only able to have them because the poster felt they could present their issue anonymously.
Second, I don't believe you've thought through the overhead of your suggestion. Does pg hand-approve new accounts, requiring a faxed copy of a driver's license or other state-issued identification? Or do we wait until someone flags an account as "possiblity not a true identify", and, again, burden pg with chasing that person down until they prove they are who they claim, and with dealing with the complaints it will generate?