Your title makes no sense. According to such agencies, there are no "innocent" people. From their perspective, there is only definite threats and potential thre

Your title makes no sense. According to such agencies, there are no "innocent" people. From their perspective, there is only definite threats and potential threats. And yes, the vast majority is doubtless completely useless. They're looking for the proverbial needle in the haystack. Their rationale is that, in order to find the needle, they'd better ensure they have the entire haystack (preferably the entire farm).