I mean, do they really want to know about your dog's bowel movements?
They're trying to identify terrorists. Or so they say. It's one small step once they have the database set up to start searching it for other things. We've seen it all too often in the past. And you'll notice that Obama quickly shut up about anything privacy related once he was briefed by the White House.
My guess is they've got an amazing, beyond anything we can imagine, network set up that listens to EVERYTHING. We quickly and quietly find and destroy targets that use communications. We OWN them.
But what happens if some tea bagger becomes president? How long until they start looking for atheists and liberals?