Biggest issue with using FOIA in this way is that you have to show that the information impacted or mattered for later adverse actions (and, under the "substantial evidence" standard, the decision will likely still stand on review; I don't think that this standard should be applied as often as it is- I think that the "contrary to law" standard is often more appropriate). This is often the rub. You could have a "smoking gun" in the way of statements that are improper or somehow damning...but, the real issue is showing linkage to the later action. This is especially so when there are other decision makers or approving authorities above the person who made the statement. Unless the person was the ultimate decisionmaker and you can show that they actually relied on the statements, it can be futile to use those statements. I am not suggesting that it is never worthwhile to get such information. Just be aware that it is not so easy to make "hay" out of it. You have to look at the underlying issue and the facts in the record to figure out whether you can use this type of information effectively.
Jason,
The biggest benefit of a FOIA/Privacy Act request is that the people you hit for the information.....KNOW it......and they will typically do one of two things....either come at you harder...or have a "oh crap" moment when they are handing the package to the JA for review...and realize they "could" be in deep trouble....and that "could" result in them backing off...
And you'll also find out for yourself that a couple guys who you thought were on your side...aren't...and are playing you.