But now that you mention him, the man was working at Bell labs during the time when Ken wrote his famous essay "reflections on trusting trust". If he shared just a small part of his colleague's spirit, it would be irresistible to him to log all passwords that thousands of people may decide to use. Mainly as a conversation starter, not to do anything bad with these passwords. Maybe he's gathering cool stories in case of a hypothetical Turing award in the future?