Imagine a world where wireless devices are as small as a grain of salt. These miniaturized devices have sensors, cameras and communication mechanisms to transmit the data they collect back to a base in order to process. Today, you no longer have to imagine it: microelectromechanical systems (MEMS), often called motes, are real and they very well could be coming to a neighborhood near you. With such a small size, these devices can stay suspended in an environment just like a particle of dust. They can: Collect data including acceleration, stress, pressure, humidity, sound and more from sensors; Process the data with what amounts to an onboard computer system; Store the data in memory; Wirelessly communicate the data to the cloud, a base or other MEMs. Since smart dust devices are miniature sensors they can record anything that they are programmed to record. Since they are so small, they are difficult to detect. Your imagination can run wild regarding the negative privacy implications when smart dust falls into the wrong hands. Once billions of smart dust devices are deployed over an area it would be difficult to retrieve or capture them if necessary. The volume of smart dust that could be engaged by a rogue individual, company or government to do harm would make it challenging for the authorities to control. Many of the applications for smart dust are still in the concept stage. We might not know when it will progress to the point of wide-scale adoption, but ... its a question of when rather than if.