CB

So allows to demote yourself as super-user, locking you effectively out.

To reproduce:
- List users,
- checkmark all (including yourself) to add a new group "test" created before
- click batch tool
- celect "test" group
- click "process"

After that you're logged out and locked out, leaving only way to add yourself in configuration.php file or through database.

Actually, no changes for yourself should be possible in the batch tool probably ?