Rising numbers of online attacks against journalists have been documented globally. Female, minority reporters and journalists who cover issues interwoven with right-wing identity anchors have been primary targets. This trend reflects growing forms of mob censorship linked to the demonization of journalists and the press by populist leaders. Based on recent cases in the United States, I define mob censorship as bottom-up, citizen vigilantism aimed at disciplining journalism. Effective responses are hard to come by given the pervasiveness of digital hate speech and the limitations of traditional approaches to the problems it represents for democratic communication.