I was entirely taken aback by the threat. This is an issue that San Francisco critic Michael Bauer has already brought to light. But here are my two cents: hadn't I already confirmed my presence when I booked the reservation? What if I'd been out of the country until the day of and couldn't call back to confirm? A gentle reminder phone call would've been more apropos. And at the end of the day, there are too many good restaurants that don't require reservations for this redundancy to be necessary. What do you think?
Source: Flickr User joey.parsons