I really only care about out of print and rare materials. Passing around a book through the mail that's been out of print for 80 years is rather dangerous when you care about its preservation.
For some reason we legally treat these as identical to some mass market paperback trade of say diary of a wimpy kid and that's stupid.
If we care about research, preservation of materials, having them available for future generations, then really, the sacred holy protection of copyright can take a hike when dealing with those texts.
I frequently have to get on planes and fly off to University special collections and sit in some special room where I can't bring in a camera and have to carefully read through something that can't be digitized because we're somehow not smart enough to see a difference between that and a Dan Brown novel you get at the grocery store.
Pisses me off. Holistically speaking, what the fuck are we doing? This stuff shouldn't be special and precious. We've had photography for over 180 years, this isn't some strange new phenomena here.
I should be able to browse such documents from the same bed I'm lying in now writing these words, not book a plane to fly across country because librarians are justifiably paranoid about some asshole copyright lawyers.