It's a sort of similar to the prisoner's dilemma. It's hard to keep a community cooperative when there are defectors about and our impression of how likely oth

It's a sort of similar to the prisoner's dilemma. It's hard to keep a community cooperative when there are defectors about and our impression of how likely others are to defect on us influences how willing we are to cooperate. That's why you see people looking for smaller, more trust-bound online communities to associate with.