More wasted money. If the idea is to actually catch people with illegal guns then you shouldn't publicize it. Test it discretely then deploy it. Now, anyone with a brain will figure out how to get around it and the government will tout how well it works at keeping the streets clear of guns.
,,,,,watch,,,,the libs will tell the police they need to put up a warning sign" weapon detector ahead".wouldn't want any bad guys civil rights violated.