Is it possible that the guy got rid of posts where I've put my address? It's strange that I havent posted anywhere... I even participated to the Bitmixer campaign because there was a time where posts in Politics&Society were counted so I could enter the campaign without changing my post habits. Don't know if there is an archive of this though as enrollment was automatic. Maybe Lauda has a file somewhere but I doubt it.
Yes, hackers often remove addresses from posts but admins can restore them. PM theymos and cyrus to see if any of your posts have been removed containing addresses. Lauda probably didn't keep records of payments, but if you can find those addresses maybe they'll help. You can always try googling them to see if they've been indexed or saved on any of the several bitcointalk mirrors.