The LaserWriter IINTX CAN have a password, and that password is sufficient to
prevent settings in the LaserWriter from being changed.
More importantly, the only password in the LaserWriter family (PostScript) of
printers is the system administrator password. If this password is set to
anything other than "0", the LaserWriter will not work with the LaserWriter
drivers from Apple. If the password is set to zero, the LaserWriter
effectively has no password. The LaserWriter drivers expect the LaserWriter to
have no password and will not print to a LaserWriter with a password.