> So the publisher prints the warning inside the book to remind customers not to buy them like that. But the publisher's warning also verifies that it's a bona

> So the publisher prints the warning inside the book to remind customers not to buy them like that. But the publisher's warning also verifies that it's a bona fide copy. Just imagining... Dear downloader: please make sure the file with the sha1 hash fingerprint "34973274" is accompanied with a physical copy of our famous hologram logo sticker. If you don't have the sticker then STOP-- do not open the program to view the contents.