Have a look at the ngk website, it doesn't mention coil issues or the plug causing it, just that it isn't an uncommon thing to see if there's oil vapour near the plug. I assume anything with massive voltages in would have some form of charge near it which would make a static effect?
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PF late '97 D2 2.8 Aluminium Silver. Solar roof, Full Heated Leather, Double Glazing, 17" wheels, Sports Steering Wheel, Cruise, Blinds, Bose sound.
Fiat Tipo diseasel econobox with all the buttons and none of the soul that now does all the heavy lifting.
Ford Capri Laser: noisy, slow, thirsty, bouncy, no buttons but it always sounds like it’s REALLY trying and I can’t help but chuckle when it parps and boings along. And people of a certain age stare at it with a wistful look in their eyes that clearly says…I had one of them. And I sold it because of the kids 
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