What about files which the government won't admit the existence of? For example, what will someone on the no-fly list see when they submit a FOIA for their files?
I received one of these when I submitted FOIA on myself.
FOIA is really just a way to make people think they get access to data about them or important things. Most FOIA's about real topics get flat-out denied or the govt pretends to not have anything about the subject.