Since this has grown beyond all our wildest dreams, and is international, I get the notification ding at all hours of the day/night. I can't turn on iPhone DND because my phone HAS to ring/notify me of incoming texts. It would be a cool feature to be able to set DND hours, and then I don't have to try to explain to my wife why my phone dings because somebody appreciated a post in "Dating Experiences good/bad" at 02:00 PST