Most of us use the review system to review guests before they visit, but this review system doesn't give us insight into one of the most important factors that we expect from our guests. A factor that can affect us hosts long after the guests leave. This factor is," what sort of a review will this person leave".
We all expect that our guests will write honest and fair reviews and in most cases they do.
Unfortunately there are people out there that cannot be pleased and no matter what we do as hosts, these people will give you a negative review. These people slip through Airbnb's review system unnoticed because hosts dont know until after they have written their reviews.
Unfortunately, we cannot rely on Airbnb to remove these reviews as they have failed so may hosts in this regard.
Here is what we can do however.
Don't simply look at guests reviews. Make sure you look at the reviews they have left for hosts for past visits as well. If they appear to always write negative reviews that are responded to by the hosts, DO NOT approve their booking. They are likely to cause you grief and lower your ratings.
If you do find that you host someone like this, and you have written them a 5 star review, have your review of them removed. You can't change it but you can have it removed. If the review no longer accurately reflects your experience of the person, Airbnb will have to remove it.
For the hosts, that check prospective guests as I have suggested above, they will see your TRUE review in your response to their review.