A “host” in our New York City condo turned her apartment into a hotel, in direct violations of our condominium by-laws. Strangers with suitcases were in our lobby on a regular basis. When caught she put up a fight, she used her AirBnB website to blast away nasty, even racist comments at the condo board and me. Happy ending: It is difficult to complain to AirBnb without becoming a member, but I was able to do so by going through their safety concerns website. AirBnb wrote to me and thanked me for pointing out the violation of their usage guidelines.