Back in the 70s and 80s we had extensive bonding of raised floors but after IBM cleaned up their act and used better shielded power supplies in their computers it became a whole lot less necessary. I have been in 308x computer rooms where they used 1/2" copper pipe, in a grid, to bond every floor post. Even IBM said that was overkill.
A lot of times regular hardware or software problems got blamed on "noise" and these draconian measures were taken.
I have had to come in at night and fix the hardware problem to save the IPR's butt when all the bonding didn't fix anything. The story was always "it was a couple problems yada yada".
