dang bans someone from HN? no confusion. alcohol banned in public? no confusion. weapons banned from schools? no confusion.
books? oh my god, they aren't banned they just aren't allowed
Notice how all of those bans include a specific context? From HN, in schools, in public.
No confusion.
Notice how the only context in the headline is “in Portugal” but the books are not banned in Portugal?
Confusion.
It’s really not hard.