I am not a fan of digging accounts and I really do not encourage it too. If you are correct then good job but if you are not correct then this is simply an insult for the user you are digging up. People used to do it long ago when the merit system started but they started to get bored.

If this is really something gives you pleasure then sooner or later someone else will do the same for you and you can be in the same problem easily. Before posting such thing, have you attempted to chat in PM with the user to find out yourself what happened first? They should have given you an answer. A lot of time your curiosity could be served only just by have person to person conversation.