Many broadcasters have begun offering personalized services or creating social media platforms for their audiences, in particular taking advantage of the possibilities of hybrid broadcast/broadband approaches. This generally means that the listener/viewer has to create an account on the broadcaster website where their personal settings and preferences are stored. This new way of operating represents a small revolution in the usually anonymous broadcast world and it has many legal and technical implications: what information can be stored about the audience? How can it be used? What can be shared with partners? Where is the data stored? For how long? And so on. The legal aspects will need to be addressed, but in this post I’ll focus on the technical aspects.