[Vendome]

According to the DNI, the NSA only accesses those online records if there is a “foreign intelligence purpose” and the target is “reasonably believed” to be outside of the U.S. The program is authorized by Section 702 of the Foreign Intelligence Surveillance Act, and the searches require approval by a secret FISA court.

Hey, KGB wannabe.  The term "reasonable" is an invention for you to create new state powers where none exist and violate those which are enumerated!

The term you must apply is "Probable Cause"

the distinction is quite marked, not even subtle.

With reasonable cause one can conclude that It's Possible to conclude a thing or condition exists.

Under Probable Cause the conclusion leads one to believe by preponderance of facts that a thing or condition must be located in a specific place.

We did away with Witch Hunts centuries ago and we can do away with FISA, returning Americans God given and sacrosanct rights to privacy.

[txhurl]

We probably did away with witch hunts once we ran out of ‘witches’.