Members of HomeSharersSF, speaking at a rally at City Hall in San Francisco before the big vote on the Airbnb Law in October 2014. (credit: Kevin Krejci) It’s not every day that a major tech company sues its hometown. But that’s exactly what’s just happened: on Monday, Airbnb sued the City and County of San Francisco over a new law set to go into effect next month. The new law expands upon a previous ordinance, which Airbnb itself helped initially draft.