In nearly any context, people are attentive and judgemental when it comes to the affairs of others. Vigilant audiences entail a range of phenomena, span geographic areas and vary in their motivations as well as their affiliations. This watching can escalate to vigilantism if audiences witness something that demands a response. We understand digitally mediated vigilantism to include practices where citizens (or digital media users more generally) are offended by other citizen actions, and reta...