[linkregister]

Isn't an NSL by definition a non-noisy, targeted method? I'm going off of the widely known methodology for getting data from a U.S. company, FAA 702, popularly known as "PRISM".

Do you have any links describing NSLs being part of a noisy, dragnet operation?

[Aelinsaar]

No, I'm working under the assumption that the NSL was a first step in mass collection.