European institutions as well as member states have been recently promoting participatory procedures that are proclaimed to contribute to the legitimacy of political regimes and decision-making processes. Discussing three cases in the controversy over GMOs in the Czech Republic and France, this paper analyses participatory procedures as a power technique, and argues that they have a tendency to strengthen existing power and epistemic relationships. The paper goes on to focus on the initiative of Faucheurs volontaires (voluntary reapers) in France, a collective mobilised to destroy GMO fields. The paper contends that it is a strong and remarkable form of public participation and discusses its key features: focus on material effect on the world; the dispersed character of action; and the personal legal and bodily engagement of the reapers. On the basis of the three cases, the paper argues that the idea of an all-inclusive governance is treacherous.