I think Airbnb should help hosts with a feature to ban/disallow bookings from certain guest wanting to book our house, let me explain the scenario:
There are occassions where we had a bad experience with a guest and we would provide a honest feedback in their reviews, what could happen in the future is think about this person re-booking our house in the future with the wrong intention for example have the opportunity to write a new bad review as a "revenge" (causing your scores goes down) or simple having an excuse to bother your life.
What do you think about it?