In the last few decades, scenarios have provided a way of analysing the implications of alternative futures, especially as they might be impacted by new technologies. This has been no less true of ambient intelligence (AmI), which may be embedded everywhere in the not so distant future. Most of the scenarios developed by AmI enthusiasts have been rather “sunny”, showing how new technologies promise to make our lives more productive and enriching. A European project called SWAMI (Safeguards in a World of Ambient Intelligence) deliberately developed “dark scenarios” to highlight the threats to privacy, identity, trust and security and inclusiveness posed by new technologies. This brief describes the SWAMI scenarios and the methodology used to construct and analyse them.