Auto logout idle users

[kadiyamraviteja]

Does any body know how to log out idle users. NOT locking but logging out

[MirkoK]

What should happen if such an idle user has some document open, or some long runnning program?

Here's an idea to use a fake screensaver to kill the whole user's session. Maybe you can adapt that:

http://ubuntuforums.org/showthread.php?t=956024