BTW, airbnb got back to me about the host who wanted to more than double the rent on me. It seemed to be a form letter from a non-native speaker. It didn't exactly address my problem -- it seemed to focus on hosts who want "off-site" payments for security deposits and such. But it appears they did remove the property from the website. Honestly, I think it was an inexperienced host who rented the property through other channels and didn't fully understand how airbnb works.