Hey reno, I know what you mean but I have seen grounding systems on fused panels. I just had to re-wire an OLD house in Laguna Beach that had a fuse panel, but what the original (maybe?) construction included was metal device boxes connected together by a seperate, bare #14 that eventually made it's way to a cold water ground. Down the road, apparently another owner changed out the 2-contact outles with 3-prongers, using the yoke-to-box bond as the ground. The ground actually checked out OK, but I would never trust it in my own house with my kids running around in it.
On the upgrade, I drove a rod and bonded to the new copper plumbing, and got rid of the fuses for obvious reasons, but I was surprised like you to see the house bonded at all.
