That is why after your first FOIA request you send another FOIA request that requests all correspondence and documents generated as a result of your first. Rinse and repeat until you find an attractor. ;)

Since their logic is you cannot be safe unless they know everything about you - they most likely have a file on every human being in the USA, maybe a large majority of the planet.

I wouldn't rule out the possiblity that your participation in a thread about this is in your file.

haha don't worry, they have a file on you ;)