@Yvonne357
Yes Yvonne, this is true!
Airbnb are very secretive about any personal information until a booking is put in place, and this is where their system becomes open to abuse.
The second a guest books, they are not only given your personal phone number but your property address and other information such as your key box code for property entry.
At that point there is nothing stopping the guest cancelling their reservation and, within 48 hours of booking, getting a full refund as per......https://www.airbnb.com.au/help/article/1345/is-the-airbnb-service-fee-refundable and using all the personal information given to them on booking.
I don't quite know how Airbnb should address this situation but I have had the same thing happen to me where a guest has booked an immediately contacted me privately! In fact I didn't even know I had the IB at the time the guest rang and I wondered what the hell this strange person was talking about until they clarified and I checked! It didn't cause an issue for me but can see it being something that could be exploited by some sections of the travelling public!
Thanks for raising it Yvonne.
Cheers.....Rob