There’s no such thing as a negative rating. The range is between 0 and 5, but these are all degrees of positivity. The more customer ratings you have the better higher rankings you can has in Google Maps. Think about it. If Google allows you to rank down your competitors’ websites, it would be such a mess.
For other local search, visit our Google Maps Algorithm page, Google Maps Optimization (Google Maps SEO) page, Live Search Map and Yahoo Local page.
[...] Negative Customer Ratings [...]