This is Yelp - don't they have a track record of leaving fabricated negative reviews for companies that refuse to do business with them? They probably don't want to reveal the identities of the anonymous reviewers because they're not actually real people.
I don't think I've ever heard of Yelp fabricating negative reviews, though there have indeed been numerous allegations of their downplaying positive reviews of businesses that don't pay their Yelp Tax.
That said, the more we hear about their business practices, the easier I find it becomes to wonder if we will indeed one day discover Yelp-fabricated negative reviews.
