Comment 1 for bug 12297

Because the window manager is ignored (Window menu and close buttons can't be
used), it might also be nice to drop the borders, like the gnome-logout does. It
makes things look much more like "You are doing something with the OS (switching
user), not just looking at a dialog window".

By the way, I wonder: Why does gksu lock X at all? Does it prevent malware,
running with the priviledges of the active user, from reading the keystrokes?
Could the looks of gksu, including the locking of X, be mimicked?