I often read reviews of places and things I'm even tangentially interested in. As a user, there's little more unprofessional to me than a company replying to negative reviews with anything but an apology, or offer to help or do better.

So many places, especially local ones, take every sub five star review as an insult and invitation to argue. I'm actually shocked by the percentage of places that do this. It drives away my business, and I can't be the only one.

Even not replying at all is a better strategy, IMO.