The forums usually have more than one administrator. Now the administrators (according of the permissions that these have) can ban, delete or edit others admins.
In my opinion should exist a 'founder' account. The founder creates the forum and never can be banned or deleted and only the founder can edit his data (nick and email).
If the founder wants to transfer the account to another person may do so by editing the account data.
It's a security measure used in other forums and I think it is a very good idea. It is a very simple measure to protect a forum and that can avoid many problems. The security in all aspects is very important.