But this was a book, not arsenic being sold to cure a disease. Telling whatever bogus claims in a book doesn't do any harm per se: surely harm can only happen i

But this was a book, not arsenic being sold to cure a disease. Telling whatever bogus claims in a book doesn't do any harm per se: surely harm can only happen if someone is stupid enough to actually believe the claims. And the people who don't happen to think about cross-checking information with a couple of other sources before digesting it will surely suffer from the lack of that very habit eventually. If the same did apply to everything we'd have to shut down most of internet and reduce the selection of non-fiction books only to cover academic publications to be on the safe side.