That is always the danger. WHo decides what is dangerous and what is not. And while we may all agree at one point in time that something is dangerous, that point is but the starting point, and then opinions diverge. Once you start out, usually with the best of intentions, to ban books, you have just stepped on the slippery slope. And there is no bottom until sanity steps back in and the ban is lifted.
I did not realize that the book banners were so powerful over there. We have them here, but they are for the most part either localized or not powerful enough to enact any bans.