From the same Washington Post article as before:
In one required tutorial, NSA collectors and analysts are taught to fill out oversight forms without giving “extraneous information” to “our FAA overseers.” FAA is a reference to the FISA Amendments Act of 2008, which granted broad new authorities to the NSA in exchange for regular audits from the Justice Department and the Office of the Director of National Intelligence and periodic reports to Congress and the surveillance court.
Okay, so again, on some level, this is totally ordinary. You don’t have to be a cackling evil conspiracy to not be really interested in putting tons of detail in your reports to your oversight committee so that they then ask you a bunch of questions, harassing you and exposing some mistakes.
But it also shows the ways in which “rigorous oversight” doesn’t work to prevent abuses.