George,
I think that we always should bond the interior water piping to prevent it from becoming accidentally energized. If we don't bond the metal interior water pipe we could have a problem with an electrical device that is conneted to the water piping failling in a manner that would energize the water pipe creating a different hazard.
It looks that solution will take the cooperation of the plumbing and electrical codes. The electrical code would be changed to prohibit the use of the underground water pipe as an electrode, but still require the interior water piping to be bonded. The plumbing code would be changed to require a non-conductive section of pipe in the water service at some point before it enters the building.
