To read a Web-exclusive story about how various partnerships can expose farmer-run co-ops to investigation, click here.

Conspiracies are the stuff of political thrillers, Internet manifestos and now–allegedly–the dairy industry. A group of Northeastern dairy farmers filed a class action lawsuit in October 2009 against Dean Foods and industry co-op Dairy Farmers of America (DFA), among others, alleging the parties have monopolized the purchase, processing and distribution of fluid milk in the region.