enable super-user-password

[nbctcp]

I need to understand behaviour of that command

I beleive function of "enable super-user-password" is like cisco enable.
Anyone that know that password could become admin after enable

# enable super-user-password adminpwd
Let say I have user operator2 with priviledge 5
When he login using his password then type enable, he could become admin like issuing "conf t"

The problem was, when I try to disable that command using this

#no enable super-user-password
Error - delete other passwords first, delete super-user password last
then I did
need to delete in order
#no enable read-only-password
#no enable port-config-password
#no enable super-user-password

After that any user in that switch including admin can't enable anymore using their own passowrd or "super-user-password" password

?
1. what's the correct procedure to disable "super-user-password" 
2. in what scenario I need to use it because anybody could become admin
tq