[thstone]

Is there any reason for the resistance to using camber plates?

FWIW, -2 deg camber on a street driven car will certainly help in the corners but unless you drive continuously very fast in circles, the tires will experience a very high wear rate on the inside portion of the tire. This wear can easily be missed unless the entire width of the tire (and especially the inside portion) is inspected regularly. Many owners not used to this level of camber and uneven wear are shocked when the inside is worn down to the cord and there is still 70% new tire on the outside (easily visible) portion of the tire.