This is obviously not the case; unless there's some redefinition of what "US Person" is. (Or 'collection', 'recording' or 'reporting'.)
If this was being done, it was being done without our knowledge. So let’s don’t be disbanding the Agency just yet.
I'm sorry, but I'm a fan of extreme measures in response to extreme violations. I think murder, rape, and treason should all be capital punishment — and I think the Constitution being systematically violated by an agency ought to be severely punished.
There are still an awfully lot of bad guys out there. Ever hear of China? Russia?
The best invasion-deterrent, IMO, is still a heavily armed population — you cannot control a land w/o boots-on-the-ground physical presence.
Concur with your opinion about a heavily-armed populace being a major deterrence to attack by large enemy forces. Admiral Yamamoto was right on that account. We need someone to keep an eye (and ear) on any and all threats. This isn’t something that can be accomplished by using amateur radio equipment in one’s garage. It requires a lot of effort from professionals. And BTW, it was SIGINT that led to the shootdown of Yamamoto’s plan in he South Pacific.