Every invention/technology eventually will be used also to harm people, even those which were never meant to be used as such, from electricity to airplanes. Unfortunately seeing anything in a dystopic thriller also means someone else, not just the writer, has already thought about using it. Making more people aware can do more good than harm IMO.

This technology is in its infancy; I fear the day a policeman wearing an encoded transmitter will be able in real time to force all security cameras in the area to exclude his image and cover it with normal background when he knows he abused his power or is going to.