The Acacia stuff is actually a surprisingly accurate large scale real life version of the prisoner's dilemma, complete with people playing black (signing the contract), people playing white (fighting acacia), people using the TFT strategy (boycotting companies that sign the contract), etc.
I think I'm gonna start taking notes here, this has the makings of a great case study
( For those who don't know what a prisoner's dilemma is:
http://pespmc1.vub.ac.be/PRISDIL.html )