This paper looks at the deployment of a medical technique, reflex anal
dilatation and contrasts the way in which its deployment was a subjec
t of enormous controversy in the Cleveland child sexual abuse affair w
ith its comparatively unproblematic previous use to identify homosexua
lity. We interpret this contrast using two general frameworks: recent
work in the sociology of scientific knowledge, particularly actor-netw
ork theory, and Foucauldian work on dangerousness and visibility. We a
rgue that the specific historical conditions surrounding the two diffe
rent deployments allow an understanding of why the deployment of the t
echnique was resisted in one case but not in the other. While Foucault
helps us understand the potential for contestation between the propon
ents of RAD in Cleveland and actors such as families and politicians,
actor-network. theory enables us to examine how such conflict actually
arose through tracing the sorts of resources that could be mobilised
in problematising RAD. In particular, we note that the antagonists of
RAD had available a 'practice of rights' towards which they could orie
nt themselves in their contestation of the 'practice of care' that inf
ormed the activities of the RAD proponents.