the reason you dont hear of it happening is because the vast majority
of devices today are grounded.........

Not so "vast" in the majority anymore.

Neither of my "ink jet" printers has a ground. The laser printer does as
do the monitors and main computers. Most stuff that's powered from a "wall
wart" isn't hard grounded. (All these might have a deliberate "leakage"
to the power conductors.)