Bug 51201 confirms this, as does a friend's experience. This is potentially disastrous for systems.
** Changed in: gnome-system-tools (Ubuntu) Status: Unconfirmed => Confirmed -- users-admin removes privileges after deleting user https://launchpad.net/bugs/49815 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs