How would Airbnb even know? I have tons of clients and they often share last names with celebs, politicians. Doesn't mean they're all related. And if they are, no one has ever volunteered that information to me. "Joe and Cindy Southern booked a room. Better do a Google search to see if they're related to that pesky Lauren Southern just in case.". Something tells me they found out another way. Cookie tracking and cross referencing a IP or some shit from when Lauren used their website years prior.