This morning I finally gave up, grabbed a step ladder, and disconnected all the bulbs in the fixture. I can deal with darkness easier than a high pitched drone.
This afternoon when I got back from a meeting, one of the bulbs was back on and two were removed. Blessedly the one they left doesn't buzz.
Coincidence that they finally showed up to do something the day I took matters into my own hands? You be the judge.
/End