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Airbnb describes its anti-party technology as machine learning tools to identify and block risky bookings. The tech will be rolled out globally, but Airbnb specifically called out the US, UK, Australia, Canada, France, Puerto Rico, Spain, and New Zealand. It assesses things like trip length, when the reservation is being made, and how far the booking is from your current location.
https://www.theverge.com/2024/12/13/24320345/airbnb-anti-party-tech-new-years-eve