 SNS are hosts for a broad spectrum of ‘cybercrimes’ and related direct harms, including but not limited to: cyberbullying/cyberharassment, cyberstalking, child exploitation, cyberextortion, cyberfraud, illegal surveillance, identity theft, intellectual property/copyright violations, cyberespionage, cybersabotage and cyberterrorism. Each of these forms of criminal or antisocial behavior has a history that well pre-dates Web 2.0 standards, and philosophers have tended to leave the specific correlations between cybercrime and SNS as an empirical matter for social scientists, law enforcement and Internet security firms to investigate. Nevertheless, cybercrime is an enduring topic of philosophical interest for the broader field of computer ethics, and the migration to and evolution of such crime on SNS platforms raises new and distinctive ethical issues.