> a static ad more akin to a billboard than a tracking device The sad part is that you assume that modern day billboards aren't tracking you. All you need is a

> a static ad more akin to a billboard than a tracking device The sad part is that you assume that modern day billboards aren't tracking you. All you need is a camera, a tiny computer and some AI. Once walked by a fully electronic billboard where the slideshow crashed, the log it displayed listed everything it could identify about people passing by, age, gender, height, hair color, emotional state, ... .