Classic case of a societal problem that technology tries to paper over, and does a poor job doing so. Rhino horns are used for their keratin and "traditional" medicine ingredients.
Radiation portal monitors will not detect all quantities and there are simple techniques for masking these detections with sheilding, or via nuisance alarms if they are detected. [1]
Shark fin extraction, for shark fin soup, has a similar cultural problem. Influential people in the communities that consume these products, ie Yao Ming, could make a lot more progress by simply having public campaigns against it. [2]
[1] Source: me, I am a radation detecion PhD who works on similar kinds of problems, with similarly or more capable systems.
[2] https://www.youtube.com/watch?v=mJG7RaLX-DM
Radiation portal monitors will not detect all quantities and there are simple techniques for masking these detections with sheilding, or via nuisance alarms if they are detected. [1]
Shark fin extraction, for shark fin soup, has a similar cultural problem. Influential people in the communities that consume these products, ie Yao Ming, could make a lot more progress by simply having public campaigns against it. [2]
[1] Source: me, I am a radation detecion PhD who works on similar kinds of problems, with similarly or more capable systems. [2] https://www.youtube.com/watch?v=mJG7RaLX-DM