@tubetime I'd say through a resistor, something like a 10k resistor. Not sure why you'd add a capacitor; I'd guess the shield itself has enough parasitic capacitance to hold an ESD spike. And I don't understand analog electronics enough to know about the inductor, but I can see a case for it.

Did once encounter a USB plug converter that just didn't connect GND, so the only GND we got was through shield ground...