@Rex:
/usr/sbin/guest-account has gconftool-2 --set --type bool /desktop/gnome/lockdown/disable_lock_screen True
that's wrong and should use gsettings
@Rex:
/usr/sbin/ guest-account has gnome/lockdown/ disable_ lock_screen True
gconftool-2 --set --type bool /desktop/
that's wrong and should use gsettings