An ethnologist working in a stigmatised area within his own society cannot simply be happy with setting up the usual methodological rules. The asymmetry and the inequality between the researcher and his objects not only appear when it comes to relations on the field, but also in the definition of the topic itself. Beyond the integration of the research relationship into the project itself, we are dealing here with the question of the rendering and the diffusion of the knowledge gained and of the effects that these may produce on the populations concerned and on the political and institutional treatment they receive.