This is a not very difficult problem to solve. Whenever there is a dispute, send somebody to verify the property. For sure AirBnb already has an anti-abuse team

This is a not very difficult problem to solve. Whenever there is a dispute, send somebody to verify the property. For sure AirBnb already has an anti-abuse team, so it is an extra step there. Also, disputes anyway cost them money for the person that answers emails, sometimes do refunds, legal risk, etc. So it will also not be more expensive. It is one of these "growth" problems that a company is good to have and normally solves in an easy way. Furthermore, the author is still an active user of AirBnb.