Maybe this will help you: It would still show the extension, but requires the user to to type in the password.
What you can also do, is have the user use a USB stick to auto-login.
## QKLOGINSTAT specifies whether a password must always be
## entered manually at the login screen.
##
## 0 : makes manual password entry mandatory.
## 1 : enables a "quick login' by pressing the
## # key to accept the current password value.
##
## SET QKLOGINSTAT 1
|