I feel like this is going to make the world even flakier than it already is. If I can waste people's time without even the few minutes it normally takes to make a phone call, what's to stop a restauranteur from effectively denial-of-service attacking competing restaurants, or what's to stop me from booking 100 dinners for Friday evening because I'm not exactly sure what I'm going to want to eat (or who I'm going to take out for that matter -- smartphones make it easy to punt on that decision too), so I retain optionality.