An early version of TBBS didn't require usernames and the passwords had to be unique over all accounts. If you signed up for a new account and selected a passwo

An early version of TBBS didn't require usernames and the passwords had to be unique over all accounts. If you signed up for a new account and selected a password someone else already had, it would tell you so. You could then use that password to login as the other user. Obviously that wasn't very secure but probably was created with a small number of closely affiliated people using the system in mind.