The practices of some of Kirby's independent distributors have been subject to criticism. The Kirby is included by Lon L. Fuller and Melvin A. Eisenberg, Professors of Contract Law at Harvard Law School and UC Berkeley School of Law/Columbia Law School, as a textbook example of unconscionability. Kirby has been subject to relentless criticism by consumer protection agencies. As of 1999, of the 22 state consumer protection agencies, 15 had received a total of more than 600 complaints in just a few years. Between 1996 and 1999, the Wisconsin Department of Agriculture, Trade, and Consumer Protection received 50 complaints regarding Kirby dealers, and concluded from its investigation that Kirby, through its distributors, engaged in a "statewide pattern of trade practices" violation of state consumer-protection laws.