I just read an article over on Hemmings about rewiring, and one thing mentioned was adding a ground from the upper filler tube down to the tube that is a part of the gasoline tank. The author was working on a fiberglass bodied car, so the upper filler tube was not grounded. Well, it isn't on our cars, either, because it goes through a rubber grommet at the fender, and is connected to the tank tube with a piece of rubber hose.
So, has anyone ever heard of an electrostatic spark setting off a blaze at the gas tank filler? Or can you even get a spark there, since that tube is isolated from the rest of the car? Would adding a wire from the upper tube down to the lower tube (as that author did) actually make it worse (i.e., more likely to have an electrostatic spark there)?