Comment 2 for bug 1673471

I won't disagree with that, but it's an unscheduled thing. I filed against notify-osd as it's what is providing the org.freedesktop.Notifications interface currently. There is no way in the spec to specify how private something is, so we'd need to add some custom X-property for that I think. It would also need to detect when the screen is locked and obscure or avoid showing the notifications.