Future pervasive computing environments are likely to include large numbers of sensors such as cameras and microphones that are embedded in the physical environment and that can capture personal data. In the PACTMAN project we are aiming to develop systems that empower users to decide when and how they should disclose personal data. Our first exploration of this space has included the development of a prototype smartwatch application that can inform users when they are entering an environment that may compromise their privacy. Our prototype draws inspiration from early ubicomp work such as "a privacy awareness system for ubiquitous computing environments" and shows how contemporary hardware might be used to provide users with important notifications of privacy violations.