For some background on the user review issue look here and here. So far the only advice available to a business with negative reviews was to overwhelm them with other positive reviews. Here is another option:
Here’s a better idea: if the criticisms are either completely false or potentially true but unrepresentative of the usual customer experience (i.e., I had to wait an hour for my food, all the lights were burnt out in my hotel room, etc.), the business should provide a warranty for good service.