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Steering angle, wheel alignment, shocks, springs, unicorns will not do ANYTHING to the brakes of a car to increase wear.
On a G35, the caliper, hub and rotor are all ridged mounted to the knuckle. This knuckles moves as one (effecivly) solid unit. No matter how you change the steering angle or suspension you so not change how the pads contact the rotor, or the angle of the rotor to the caliper. They remain ridged mounted to the knuckle.
So no matter what you are lead to believe, having a bad alignment will not cause groves in your rotors. The rotor is mounted to the hub, the hub is mounted to the knuckle and the caliper is mounted to the knuckle.
With this setup, the ONLY way to do any damage to the rotor would be to damage the hub that's mounted to the knuckle. IF you managed to do this then you would have a rotor that is no longer aligned with the caliper and could cause issues HOWEVER on a vehicle like a G35 it would cause a significant wheel wobble, vibrations at almost ALL speeds and unless the guy has smashed both hubs equally, would not duplicate on the other side of the car like it has.
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