You will be required to enter an administrative password to move the app from the /Applications folder.
That
should be the case for any app. I've lost count of the number of machines I've seen with safari, addressbook, etc, moved onto their desktop, causing it to disappear for the other user accounts.
that, and something needs to be done about firefox and skype being parked in the dock as references from their downloaded disk images. (and set to launch at login even) It should pop up a dialog asking if you want to copy it to /apps instead of just living on the dmg.
