NSA uses several different parameters to identify potential targets. E.g a Tor user with no Facebook profile who recently spent two months in Syria, sound susp

NSA uses several different parameters to identify potential targets. E.g a Tor user with no Facebook profile who recently spent two months in Syria, sound suspicious? The fact that someone doesn't make a Facebook profile stands out, the fact that someone is using Tor stands out and the fact that someone is taking regular trips to Syria stands out. Nobody's getting arrested for using Tor, or not having a Facebook profile. But those are things used in evaluating people.