Is the issue the possibility of unfairly loosing future business due to a 'revenge' negative guest review?
Or
Is the issue how to prove the guest broke house rules to warrant additional payment or cancellation of the guests booking?
Response 1:
Guests should have the right to leave a review regardless if it is made-up, exaggerated or a 100% lie.
Hosts equally have the right to leave a review.
That is the nature of online review forums and is what is accepted when you sign up with airbnb. This can't be changed and shouldn't need to be.
The bad guest review is unlikely to affect future business because people can work out for themselves if the review doesn't add up or make sense. Why would one negative review over 145 positive host reviews be believed? It would be obvious from the hosts good track record that the bad review would be false.
Response 2:
There is no host cancellation penalty for cancelling a booking if the host reports house rule breeches through the Airbnb Customer Resolution Centre. Evidence helps to support the hosts claim but is not always necessary.
Airbnb and its community know there are people who take advantage of house rules that's why there is the option for cancellation. Airbnb realises it would be unlikely for the host to cancel a booking without good reason because they would be loosing business.
If your guest causes property damages it is covered through Airbnb insurance. If you have trouble with guests leaving your property, the police will remove them instantly.
If the hosts discovers extra guests staying without paying, the host can inform the guest that they are aware of this and to pay the extra fee otherwise their booking will be cancelled. More often than not the guest will accept guilt and make the payment over the hassle of moving out and finding different accommodation.
If they become aggressive you have the right to cancel their booking.
I don't think there is an issue with handling guests of this nature because there are methods to solve any of these problems.
However, what I do think is that guests with a bad track record (through majority bad reviews and complaint reports) should not be able to book again.