At risk of stating the obvious, the false positive rate will create a vast number of innocent citizens flagged for further investigation. This automated flaggin

At risk of stating the obvious, the false positive rate will create a vast number of innocent citizens flagged for further investigation. This automated flagging will overwhelm the human investigators, creating a situation in which terrorists find it easier to hide and operate amongst the citizenry, with the added feature that innocent citizens swept up will become truculent and less likely to cooperate. Net result; the US government makes terrorism easier, at vast expense to the US taxpayer.