We are not talking about the same thing as the shield on a transmission line. You are right, shielded wiring methods should only be connected on one end but I am talking about bonding that does not run with the signal. IBM went full circle on loops in the grounding to the chassis of machines sometime around 1980. We stopped talking about IG circuits on the line side and they stopped doing "baseplate grounding checks" on the machine side to insure a "star" ground. By 1980 you had to remove about 50 intentional grounds before you could get to that single point ground you were supposed to check. Somebody pulled their head out of the anal orifice and decided we were going for the "ground plane" model and everything gets bonded to everything. That ended up leaking out to the network world when we decided the same concept would stop us from buying $10,000 worth of cards everytime there was a thunderstorm. A lot of that development happened right here in southwest Florida.
