I've seen posts by PG in some recent threads out in the wild, they don't show up in his post history. I would imagine this is intentional to prevent old comment

I've seen posts by PG in some recent threads out in the wild, they don't show up in his post history. I would imagine this is intentional to prevent old comments being dredged up and used against him, much like Zuckerberg's old FB messages were automatically deleted from the recipients inbox. Fine by me, but I wish HN would offer the same privilege to its users and allow us to delete our old posts