Do not let gnome-screensaver display more!

I think the default gnome-screensaver applet show to much information for all the users, for example, any one who can press a button, can easily see your username if she(he) want to. So if you want to be more paranoid, or want to be more safe,  try this, which can restrict the gnome-screensaver display.
Here is how:
$ sudo cp /usr/share/gnome-screensaver/lock-dialog-{default,paranoid}.glade
$ sudo gedit /usr/share/gnome-screensaver/lock-dialog-paranoid.glade
Replace the two term, that is "auth-realname-label" and "auth-username-label", with glade-2

$ sudo gconf-editor
Then  change the value of
/apps/gnome-screensaver/lock-dialog-theme to "paranoid"

This can work for gnome-screensaver, but in vain for xscreensaver

But How to let LXDE show little information about you when you start screensaver? OK, starting gnome-screensaver other than xscreensaver can do this!

1. Add a line to /etc/xdg/lxsession/LXDE/autostart, that is
  
   @gnome-screensaver
2. If you have set up keyboard shortcut for screensaver, be sure to change it to
   gnome-screensaver-command -l