To be clear, I think this guy is complete scum, and he should go immediately to jail. That being said, I think Yelp should removes reviews of a business from people who have clearly never used the business' services. The purpose of the site is to review the performance of the business -- not pass judgement on the owners' unrelated activities. In this case, reviews should about the dentistry provided. While this case is well-known, trending, and the actions of the owner quite clearly repugnant, if they don't generally cull such reviews then the ratings will become untrusted as people will wonder whether or not the business' ratings are the result of actual experiences or based on completely unrelated factors.