When it comes to reviews, sometimes they can make or break your business. The best way to prevent reviews from "breaking" your business is by responding to them properly. It is never ever a good idea to delete a review, no matter how bad it is. Always take the higher road and apologize for any inconvenience, ask for contact information, offer them something that will bring them back into your business and then personally take care of the problem. All of these review sites give you the option to respond to reviews. I highly recommend that you take the opportunity to interact with your travelers and reviewers. It could be the difference between a one time customer and a lifetime customer.