I’VE SEEN THIS SORT OF THING BEFORE IN LAW PRACTICE: completely blacked-out documents in response to WAMU FOIA request. Generally you can go back to court and force them to release more, but it’s a pain. Which it’s meant to be. On the other hand it makes ’em look like they’re hiding something. Because, you know, they are. Another standard tactic: Sending a boilerplate list of all FOIA exemptions and claiming that everything falls into one or the other, without producing a Vaughn index listing documents and specific claims of exemption.