It is not just slipping that becomes an issue, but rather strength of the bolt from breaking. Just because one does NOT AX his/her car, does not mean that heavy loads will not be placed on these bolts at some point. Think of it this way... do you want to trust the different load between street and AX to be the difference between success and failure of this bolt?

I recommend one gets CC plates to not only address camber, but caster.

Jazzer