Private Facebook groups exist where hosts post photos and full names of guests who they believe behave badly, and where they discuss not wanting to rent to certain guests such as people who are Chinese, more than 70 years old or retired women lone travellers.

Facebook is investigating and closing down some groups such as Airbnb Host Community and Airbnb Guests Blacklist, which offer searchable databases of “bad guests” from Airbnb, HomeAway, Vrbo, Booking.com, TripAdvisor and others, including images, personal details and comments that could be shared publicly outside the private group.

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