This could be adjusted for other reviews a person does... a lot of fake review accounts don't have many reviews, and tend to lean towards all 5 or 1 stars respectively. It there's a variety of 2-4 star reviews, and actually insightful responses it adds weight even without anonymity. I really wish Amazon would add such weighting to reviews in terms of computing the average stars for a given product since they have this feedback data.

There's very little reason others can't do the same... extending location reviews to more than a "like" would go a long way towards helping too.