Critical notifications in paranoid mode
GNOME Shell notifications with critical urgency never time out and stay on screen permanently, unless it is closed or an action is taken. Notifications could have critical urgency to make sure the user can choose an action without needing to worry about the notfication landing in the notification tray. This should only apply to paranoid mode, since no device is trusted automatically in this mode and the interaction with the notification is necessary for a successful connection.