That&#x27;s true, with standard readers.<p>Point is, one can still read those tags in 40 mph, by the side of the road or further away. All that is needed is creating the device to the task, instead of getting one pre-made from Alibaba. Yes, that&#x27;d be a hell of a device (digital post-processing of signal, directional antenna, powerful transmitter), still pretty much doable and not even hard to hide.<p>As they say at the thread. Pretty much everything has an rfid tag nowadays. Each tag alone is not enough to track a person, but one does not need many of them for an individual signature - 3, maybe 4. Maybe we should add portable high power microwave transmitters to our usual set of home supplies.