> Are you kidding? Of course it's useful to the customer! It is not clear to me that the benefit gained by the reservationhop user out weighs the negative exte

> Are you kidding? Of course it's useful to the customer! It is not clear to me that the benefit gained by the reservationhop user out weighs the negative externality[1] paid by the rest of the restaurant goers. [1] http://en.wikipedia.org/wiki/Externality#Negative http://en.wikipedia.org/wiki/Externality#Negative