In order to challenge it in court, wouldn’t you need a plaintiff who was detained, or at least denied boarding, as a result of being a false positive, in order to have standing? Seems like there should be a lot of them, but the fact that we haven’t seen a case makes me wonder if there are humans reviewing it every time the machine registers a “hit”. Or maybe, they are just pulling people aside, asking a couple of questions and/or doing a secondary search of their carryon bags (happened to me once) and then sending them on their way, without doing anything that would give them standing to sue unless it is backed up by some other, human-found evidence.
ETA: also while Cory calls them “illegal” in the headline, the only thing he alleges is a violation of the required process to install them; nothing illegal with taking pictures or videos of people walking around in a public place.