Hi,
as you have may noticed, every level higher that “partially limited” prevents this action.
It was discussed in the past, and we have been told that it’s due to (if I remember right) usability.
Currently it is possible for apps sandboxed as fully virtualized to shutdown the computer by using commands such as that. However, it has already been reported to the devs. Thus, no bug report is needed. I just hope it is fixed sooner rather than later.
Actually, upon further investigation it appears that the devs have marked it as Fixed. Therefore, if it is still replicable in this version please do create a formatted bug report for it. I can then re-open the entry in the tracker.
Actually, never mind about the bug report. Steps for replication have been entered into the tracker by mouse1. Thus, there is no need for a new bug report.