Do we have a right to know where surveillance cameras are in the town where we live? Police cameras, like the ones used to ticket speeders and track vehicles, are usually easily visible and well marked—at least for now. What happens when they become so small, they’re effectively invisible?That’s the future of mass surveillance, according to Steven Delbene, the police chief in Scarsdale, New York. Delbene argues this is one of the reasons surveil…