In theory an admin could go through your history and make you look like a pedophile , a racist , or a number of other terrible things . People really seem to be focusing on the wrong thing here a lot . It is not at all surprising that Admins can do this there ' s no way except cryptographically signing all your messages to prevent this happening on any website controlled by someone else , the terrible thing is that he did it so blatantly and openly admitted to it . It implies that this is a somewhat . mundane . action that might be applied quite . liberally . all the time without our knowledge . Don ' t rage that admins can edit your posts and that they shouldn ' t be allowed to do it . that ' s trite . If they told you they ' d somehow prevent this in the future they ' d be lying .