User can notice that if the only administrator account on the system is disabled, standard users will be asked for the current administrator password but since the password of a disabled user is "!", it will never hash.
Steps :
1. Boot 
2. Have at least 2 users, 1 administrator and 1 standard
3. Log in as the standard user in order to be able to disable the administrator one
4. Go to settings - user (being logged as the standard user), unlock with the administrator password and disable the administrator account
5. Logout of the standard user and try to restart, notice that disabled administrator password required
6. Poweroff the computer and boot tizen PC again, login as the standard user, try to unlock, notice disabled administrator password required
Expected outcome
User should not be asked for a password that will never work
Actual outcome
user is asked for a password of a user that will never work