Can you elaborate though on the exact timing of the exchange? EJ's story makes it sound insufficient:
I used to work for an AirBnb clone wannabe, so I can't speak for the exact site itself, but the way ours operated was that you could cancel the booking at any point after it was confirmed- if you do it very shortly before arrival there were financial penalties to doing so.
Of course, if someone sends through a booking for tomorrow, or tonight, you're unlikely to have the time to sufficiently vet them. Perhaps people should be able to say "I need [x] days notice for bookings".
At least on AirBNB you can always decline a (potential) booking, so if you always want [x] days, you can simply always decline if the booking is that soon.
I used to work for an AirBnb clone wannabe, so I can't speak for the exact site itself, but the way ours operated was that you could cancel the booking at any point after it was confirmed- if you do it very shortly before arrival there were financial penalties to doing so.
Of course, if someone sends through a booking for tomorrow, or tonight, you're unlikely to have the time to sufficiently vet them. Perhaps people should be able to say "I need [x] days notice for bookings".