I get some crackly sparks almost evertime I exit the car. I even bought a Gates Static Strap and it did nothing even though I made sure it was grounded to frame and dragged on ground almost 8".
Removed it finally and I just be very careful before I pump gas to ground myself with a metal part on the gas hose.
It happened with and without car seat covers.
Ford Sport Group Option
Ford Convenience Group Option
ATX - Moonroof
Duratec 20 PZEV