Deviant or ‘bad’ behavior is pervasive in many computer- mediated social contexts. For example, chat rooms are often a venue where users make inappropriate sexual advances, swear at others or engage in other behaviors that most users deem inappropriate. Users in such environments are often relatively anonymous, and norms against such behavior do not exist or are weak. The price of bad behavior is high; users who are the targets of bad behavior may leave or avoid online social spaces. Effective responses, both at the individual and systems levels, are also costly and may not be very effective at curtailing bad behavior.