This paper argues that carnivalesque protest comprises a particular genre of activist public relations which articulates conflict with, and resistance to, dominant discourses on controversial issues. A case study of the New Zealand group Mothers Against Genetic Engineering illustrates how the carnivalesque, by promoting community relationships and influencing public opinion through values of affect, can open up new spaces for public dialogue about social issues. It is argued that carnivalesque protest challenges the notion that collaboration should be a core professional value of public relations practice.