Corporate spies for Dow, Kraft and others have tried to discredit, shame and infiltrate civic groups using an array of dirty tricks. By Steven Rosenfeld  December 3, 2013  AlterNet  Posing as volunteers. Stealing documents. Dumpster diving. Planting electronic bugs. Hacking computers. Tapping phones and voicemail. Planting false information. Trailing family members. Threatening reporters. Hiring cops, CIA More