
Originally Posted by
Blubbartron
I suppose it is a bad hypothetical. After a terrorist plot, any people that associated with them are probably going to be investigated (at least lightly). This is the part where someone with more law enforcement/government agency experience would probably be useful. I imagine (not really sure) there is some cutoff point where a person is deemed an acquaintance as opposed to an associate/friend. Acquaintances would be pretty unlikely to get a rigorous investigation, I imagine. In this case, if the NSA identified the acquaintance as part of the subset of potential terrorists (due to sarcastic remarks), they are essentially going to use "evidence" that they should not have (because they weren't going to investigate) as evidence to support the assertion the person is a terrorist/accomplice. It's hard to express it in words, but it feels like they could end up in sort of a circular evidence pattern (two or more totally unrelated things look/are innocent, but someone could put them together and claim they're related, using each as evidence to strengthen the argument that the other is evidence). I guess you could call it "fabricated" corroborating evidence. People trying to find a pattern often will find a pattern, even if no such pattern exists.
More simply, the NSA system will dramatically increase the scale of investigations. Given the fact that false positives happen, and the consequences of being wrongfully identified as a terrorist, I can't support any system that will increase the number of people affected.