24 hours before check in they messaged to demand copies of my passport and credit card information be sent to some random third party site. They said that without this the reservation would be cancelled, and AirBnb said no refund would be issued. I use AirBnb so I don't have to give my identity or payment information to untrusted parties.
During the stay, two random people rocked up and demanded to get in to fix the air-conditioner. The host did not let me know ahead of time that this would be happening.