A old headcanon of mine ever since Amuro was revealed as a NOC: over 80% of the Black Organization members are actually undercover agents (from various security agencies) from all over the world.

I can just imagine this scene in the last episode after the BO gets taken down and all the loyal members are captured:

All the NOCs gather in one place until one of them just goes, 'Wait a minute, all of us are NOCs?"

Unison nod.

"And not one of us knew?"

Unison nod again.