Suspend and shutdown

[Uno Engborg <uno webworks se>]

In FC5T3 all users have the menus "Shut down..." and "Suspend" in their 
Gnome "Desktop" menu, and if they select it the  shutdown or suspend 
happens without asking the user for
a root password.


This is awful in multi user environments, or when remote desktops are used.
Is there some easy way of turning this off?
Is this the default Gnome 2.14 behavior?

At the very least the user shoould be prompted for a root or even better 
a sudo password before he is allowed to do this.  It also creates far 
too many menu items in the Desktop menu that are very similar. The old 
FC4 way of doing this was much better from a usability perspective.

Regards
Uno Engborg