[Argonaut998]

By your logic any book in existence can be banned at any point in time. It's a meaningless designation.

[cogman10]

By your logic, no modern book in existence is banned. The books are always available somewhere.

"Banned" isn't generally universally applied. It may just be banned in the OPs libraries. Or maybe these are simply commonly banned books.

[miltonlost]

Never say a "red apple" then because lord knows it had been green at some point! It's a meaningless designation.