Disabling User List in the GDM Login Screen

I finally found some instructions to disable the user list on the gnome login page

http://www.ubuntugeek.com/how-to-remove-hide-users-list-at-login-screen-in-ubuntu-9-10-karmic.html

This was posted in December and I only found it now after several attempts. Google usually does better for me.

Thanks to Ubuntu Geek for posting this info.

I also found a discussion of hiding some users while displaying others here:

http://forums.fedoraforum.org/archive/index.php/t-194030.html