The problem with these fast moving situations is who would actually initiate that expensive legal endeavor. Yelp has a history of preying on small businesses with what is effectively extortion to remove promoted negative online reviews in what are essentially digital protection rackets. You could argue this is RICO territory.
This new pernicious hijacking of contact details is likely to be deployed by other future 'startups' to siphon off profits, so it's important that Yelp gets sanctioned.
Restaurants are terrified to sue Yelp because of the severe power differential between the "phone book" directory and themselves, especially given the long-standing rumors (whether true or not, the perception exists) that Yelp punishes anyone that complains by promoting bad reviews to their page.
