Eliezer once pointed out that our intuitions on most formulations of the Prisoner's Dilemma are skewed by our notions of fairness, and a more outlandish example might serve better to illustrate how a genuine PD really feels.

It might also help to consider examples in which "cooperation" doesn't give warm fuzzy feelings and "defection" the opposite. Businessmen forming a cartel are also in a PD situation. Do we want businessmen to gang up against their customers?

This may be culturally specific, though. It's interesting that in the standard PD, we're supposed to be rooting for the prisoners to go free. Is that how it's viewed in other countries?