The customer is always right- not so says Matt Stachel of Feasterville, Pennsylvania who has launched a website in reaction to customer sites like Angie's List  and TripAdvisor- so angry businesses can warn each other off working for 'nasty clients'.  Nastyclient.com, a website he dubs the 'anti-Yelp' where angry contractors can vent against clients and alert each other to avoid being hired by them. 

Members can search clients by name but business owners can remain anonymous. Here is how it works: