I think you are confusing my hypothetical question with me somehow condoning mass surveillance, disagreeing that it is currently happening, or disagreeing that it wouldn't happen in a hypothetical future?
I have no doubt that these tools are used against domestic targets, perhaps not from the CIA but certainly by agencies like the FBI - I work in aviation and routinely see mystery flights. Everyone in the office can guess what they are (http://imgur.com/a/17hSR - 6 hours of circling - Maybe they had a warrant, who knows.
My point was that even if we could somehow stop domestic mass surveillance, I'm not sure it we would stop using them internationally or even have any obligation to do so?