Our society is heavily mediated by information technologies, so the simplest interactions become traceable, which collaborates to a deluge of data. They represent an abundant source for social analysis and an unparalleled opportunity for citizens to access, produce and disseminate information. Nevertheless, all this affluence of data, for presenting itself in a scattered way, also poses significant difficulties for achieving an integrated view of social reality and its interactions, and is organized in many competing interfaces and information architectures, that may produce, reinforce and disseminate ideologies, hegemonic discourse and platform biases. We identify an emerging field of dispute of the place of mediation of the many flows of information, and efforts for repurposing and restructuring these flows over the seamless structuring of different competing architectures. In order to describe some of these efforts, we draw examples from the field of controversy mapping, and propose the concept of reverse mediation.