The rigid nipple coming up from the bottom is a 2"X6". It passes completely through the KO, with about 1/2" inside the can before the threads even start! The horizontal nipple has locknuts only on the insides of the cans. There's not a bushing to be found anywhere I've been in the whole building.
The wires across the deadfront were just being held up so I could get a better pic of this glorious work (they were laying across the sharp edge of the nipple).
Any wiring above the T-bar ceiling is a breeze to trace, as there are no blank covers on any of the boxes. [Linked Image]
Yup, it's bad.