On Mon, 5 Jan 2015, Hendrik Boom wrote:

> Even on VMS the administrator coculd change the permissions on such
> file. So it wasn't really a serious security measure.

I don't know VMS, but I know how this feature is intende to be used in
Windows since NT: Admin has to take ownership of the file to change
permissions and can't give back ownership to the original owner, so the
manipulation can be traced back to him (his account).