> I doubt the low-paid workers stripping, scanning and shredding the books are checking what anything is.

You don't think they are, at the very least, checking to see if the book has been scanned before?

A search like that could very easily be extended to check for rare books too.

Why do you assume it's not being done?

Why assume it is?

We don't know, and the fact that the process is so opaque and would have been totally undisclosed if not for journalists doesn't exactly make me confident they are "doing things by the book" on this one.