Humans have always built defenses to match the prevailing threat of the day, from medieval castles to Cold War fallout shelters. In his Shura City concept, Asher J. Kohn speculates on what it would take to drone-proof a city. He envisions several features:

Buildings
Based on Habitat '67--architect Moshe Safdie's experimental housing complex in Montreal--the buildings will have no consistent external layout, making it difficult to map the city and track residents' movements.

Smart Windows
Made of multicolored glass, these windows will make it difficult to see in and easy to see out. They will also feature internal machines, which normally operate blinds, but could detonate if a scanning drone is detected nearby.