Banning books is hardly a new occurrence and people have been riled up about it for decades.
Parents pay taxes to fund their public schools. They absolutely have a right to voice concerns about books in those schools. Schools are administered locally. What parents in San Francisco want read/available in their school libraries may not be the same as what parents want read/available in Norman, Oklahoma. We don’t have nationally run schools in this country nor do we have a nationally mandated curriculum. Tennessee is an excellent example. The book Maus will not be read as part of the 8th grade Holocaust curriculum and other books will be used instead bc parents had issues with language and nudity in the book but it’s not being banned from the school overall.
That said, I think there should be a review process which parents use in conjunction with the schools to voice concerns about books and determine what should and should not be available at the elementary, middle and high school libraries.
Also, as many posters have pointed out banned books are available via the internet as well as public libraries, Amazon and bookstores.