dkatana writes: Barcelona has more than 16,000 Airbnb listings and, according to reports on Cities of the Future, 79% could be illegal. "In April, Airbnb's European General Manager Jeroen Merchiers confirmed, during the Student Tourism Congress in Barcelona, that the platform has more than 85,000 listings in Spain alone." But most Airbnb hosts do not apply for a permit, fail to pay insurance and tourist tax, and ignore Catalonian law that forbids short-term rentals of rooms in private homes. "Residents," says the article, "had been complaining about the rising number of tourist apartments and the conduct of the mostly student-age renters. The majority from Italy, Germany and the UK were partying all night, some running around naked, and generally trashing their neighborhoods."