[csx4017]

Pin drive wheels don't come off because there is anti-seize / lube on the mating surfaces. Pins do not shear unless the spinner is not torqued sufficiently. To lube or not to lube.........that is the question. I suggest that the primary reasons for spinners being difficult to remove are;

1) dry threads ( potential galling )
2) dry spinner contact chamfer to dry wheel chamfer ( potential galling )

I lightly lube all mating surfaces ( except during a pit stop )
My experience with bolt or pin loading suggest they will see yield load before ultimate load and start to bend before they shear........If they actually sheared off, the wheel must have been walking out and putting the pins in a shear bending mode.
I think wheel to hub surface lube can be debated but I suggest lubrication of the chamfers and threads is critical to an uneventful removal.

What say you ???