Facebook's controversial emotional manipulation study has users outraged and, at least in Europe, regulators are responding. The study has prompted "several" European data protection agencies, including Britain's Information Commissioner's Office and Ireland's Office of the Data Protection Commissioner, to look into whether Facebook broke privacy laws, the New York Times reports—the latter agency being important because Facebook's international headquarters are in Dublin. Neither has launched a formal investigation yet, but the Irish agency has sent questions to Facebook about the study. More: