This is entirely unrelated to the TSA (which is a social welfare program with the goal of security theater rather than actual security). Although your comment

This is entirely unrelated to the TSA (which is a social welfare program with the goal of security theater rather than actual security). Although your comment is correct, it applies to all forms of security. The polygraph, for example, is a form of interrogation that measures physiological response to hostile stimuli. Trapwire is very similar in that its measurements may be indicative of someone unpleasant, but the vast majority of criminals will have no problem evading it.