I don't see this as a terribly crazy want. Perhaps you want to quickly check if you have any notifications, you power the screen on, and BAM, you have three emails and two texts that you can quickly decide if you want to get to. As it is, you either have to wake and unlock the phone entirel (and check the badges on your app, load the app and see what the notification is about)y, or deal with your screen lighting up every time you get a notification.
For me this would actually be rather handy with facebook. As it stands, I basically turn all notifications (for FB) off because I am constantly seeing the phone's screens turn on when I have no desire to be alerted every time a person pokes me.
To be honest, getting to the bottom of what exactly the thread starter did and didn't want was too convoluted and frustrating, so I gave up.
How is this not DND? It does exactly this now, does it not?