Website caches can be handled differently, but bulk collection of commercial works can't have this same public access treatment. It's crazy to think this wouldn't be a huge liability.
Battling for copyright changes is valiant, but orthogonal. And the IA by trying to do both puts its main charter--archival--at risk.
The IA should let some other entity fight for copyright changes.
I say this as an IA proponent and donor.