Two points here:
[1] My strong suspicion is that the suggestion that they might have attracted the NSA's attention is thin cover for the real purpose: to expose the program and thereby derail its mission. I'd bet a dollar or two these are people involved with others that are actively trying to oppose the United States.
[2] During 'discovery', one of the first things I'd ask from the Government side is "Okay, you think you got monitored. When phone numbers were you having conversations with?" If the numbers are not on "the list", then argue for dismissal... but consider adding them. If on "the list", then charge the plaintiffs with treason!
Name the foreign person with whom you were having a phone call, why you believe that person was a member or associated with al-Queda, the phone number he was calling from and what was said.