I'm a career sales professional and learned a long time ago that transparency and honesty go a long, long way. In line with that, I think a merchants best play is to allow the vast majority of negative reviews to be posted and to respond to them.
Example: ezlovan (Stirling Soap) had a complaint that his product didn't smell like the real Creed product which costs many, many times more dollars. A comment could be something like, "We are sorry that you don't like the scent and will be happy to refund your money. The market doesn't allow us to use Creed branded scents. The product we sold you cost $13. Creed Advantus is roughly $190. Market reception to our 'inspired by' products has been very positive. Again, we will be happy to refund your money and apologize for any inconvenience."
As a consumer, I respect the fact that my review impacts how someone else makes a living. There has to be a good reason for me to leave a negative review.
Example: ezlovan (Stirling Soap) had a complaint that his product didn't smell like the real Creed product which costs many, many times more dollars. A comment could be something like, "We are sorry that you don't like the scent and will be happy to refund your money. The market doesn't allow us to use Creed branded scents. The product we sold you cost $13. Creed Advantus is roughly $190. Market reception to our 'inspired by' products has been very positive. Again, we will be happy to refund your money and apologize for any inconvenience."
As a consumer, I respect the fact that my review impacts how someone else makes a living. There has to be a good reason for me to leave a negative review.