I am, as always, humbled, flattered, and honored. But if it were me, I wouldn't bother with FOIA; nuisance calls designed to cause problems for you, coupled with actually having to have dealt with the issue, is a good basis for a civil suit. You can go to the GDC, fill out a warrant in debt form naming "John Doe, representing person or persons unknown", as the defendant, then ask the clerk for a subpoena duces tecum form, which you fill out naming the appropriate agency as the witness with the records to be produced, and ask the clerk to issue it with service by the sheriff (extra twelve bucks). Once you find out who it is, then you correct the name of the defendant with a motion to correct misnomer, get the thing served, and presto, you've got a trial for damages!
I'm often overwhelmed at the amount of useful information you provide Dan.