I don't understand your logic. Just because countermeasures could exist, it doesn't mean that the original offenders aren't so bad. Nor does that place any new

I don't understand your logic. Just because countermeasures could exist, it doesn't mean that the original offenders aren't so bad. Nor does that place any new responsibilities on the restaurant, to piss off their customers who by now might have been going to the same restaurants for decades, with the informal system. Furthermore, an ID check isn't as painless and easy to implement as you say. Often, other guests arrive before the person who made the reservation. Public figures make reservations under assumed names. And the name on someone's ID may not match the name they typically use (read patio11's brilliant piece http://www.kalzumeus.com/2010/06/17/falsehoods-programmers-believe-about-names/ http://www.kalzumeus.com/2010/06/17/falsehoods-programmers-b...). And then there's just the offensiveness of requiring people to carry ID in the first place.