I can smell where you are…
In the future there will be sensors that can smell who you are. Like finger prints and eye scans, each person gives off a smell signal. Although this smell signal can change in degrees the basic smell of a person remains. Right now only dogs have that ability to track by smell but soon small box devices with GPS and cell phones could be used to track people and there movements.
What if there were millions of smell detectors just like there are millions of cheap video cameras every. With video you can lose track of a person and usually people have to be watching all the cameras to follow someone. With smell trackers a computer detects the smell signal and informs authority. Also with video you have to be in front of the camera to be seen. With smell trackers the devise has a full circle range around it.
You can also hide these smell tracks, so people who are being tracked wouldn’t know where the devices are and could not avoid them. Places like the DMV could gather smell information on the actual person and put the smell signal to a real name. Give that smell signal and name a number and start tracking.
This form of tracking people is less intrusive than implanting a GPS locater under their skin. It’s a fun fun future!