I did a report on book banning once.
Actually, I did reports on book banning three separate times with three separate teachers, with three separate sets of parameters so I was able to write about the same topic in different ways, but this is specifically about the report I did in university. The actual specs for the report included that we were supposed to complete some kind of study or poll (this was not a science class). I put the questions out on a couple of forums I belonged to at the time and asked a few IRL friends as well. A lot of the questions were standard for this sort of thing, I think - were you ever assigned to read a banned book, did you ever read banned books on your own, did you read/were you assigned them BECAUSE they were banned or did you find out about them being banned later, what's your opinion on banning books, etc.
But there was one question I asked that ended up reshaping the entire thrust of my presentation: "Are there any books that you think SHOULD be banned, and if so, why?"
Here's the thing. Most of the forums I was posting on were fan spaces for a book series that, at the time, was one of the most banned/challenged books out there. It's a fandom that I have since entirely distanced myself from, that I one hundred percent do not recommend to anyone, that I will actively attempt to dissuade people from reading or talking about, and that I would like to not be popular anymore. I'm sure most of you reading this can guess which one I'm talking about (I won't name it or go into specifics because I don't want to trip any filters unnecessarily). But it was KNOWN that these books were banned in a lot of places. A lot of people wore the "I read banned books" badge with pride. I fully expected that the answer to that question would be a resounding "no" from the forums, and that I'd maybe get a few affirmative answers from one of the other spaces.
I was shocked. Not only did a lot of people come back with either "not exactly but I think we should keep [author] or [book] out of the hands of children" or "yes, [book]/anything by [author] should be banned because XYZPDQ", but not a single person who responded gave me the same answer. The only one I remember - keep in mind it's been almost twenty years - was that one person specifically said The Bone Collector, and for the "why do you think it should be banned" question, they only said, "No. I'm not explaining it. It's too horrible to even think about. Just believe me when I say nobody should ever be allowed to read this book."
I highlighted that last comment in my presentation, along with several other of my "favorite" official reasons for banning books - the Alabama school board that banned The Diary of Anne Frank in 1984 because it was "a real downer", the district that removed A Raisin in the Sun because it was "pornographic", the library that took Charlie and the Chocolate Factory out of circulation because it "might be hurtful to children without parents", and things of that nature - and pointed out that all of these were the same thing. This was somebody saying "I don't like this, therefore nobody should read it, and I shouldn't have to explain why." I also pointed out that if you can't give a good reason, the whole thing falls apart, and then I quoted "Smut" by Tom Lehrer:
All books can be indecent books,
Though recent books are bolder,
For filth, I'm glad to say,
Is in the mind of the beholder.
When correctly viewed,
Everything is lewd.
I can tell you things about Peter Pan
And the Wizard of Oz - THERE'S a dirty old man...
Go back to that paragraph I mentioned earlier, about those books that I no longer recommend to anyone. Notice how I phrased that. I don't recommend them. I will tell you all the reasons why I don't think you should buy them. I will tell you all the problems with the author, with the franchise, with the writing. I wish they were out of print, I wish they were deeply unpopular, I wish nobody would ever read them again.
But I still won't advocate for banning them.
It's so easy to twist a justification. Look at what I quoted up there! A Raisin in the Sun was banned for being "pornographic". One of the websites I used as a source responded to that accusation with "Did they read the same play I did?" At the time, I thought the comment was funny. Now, twenty years later, I realize: It was a buzzword. It was a convenient label. At the time of the challenge, just saying "it's pornographic" was enough. Obviously you're not some kind of sicko who wants to hear about all the pornographic details, are you? Freak! That's pornography! And they're teaching it in schools! We should get rid of it!
A Raisin in the Sun, for anyone who didn't study it at any point or read it (or watch the movie, which was very good), is a play/movie about a black family in Chicago in the 1960s. The family matriarch has been in domestic service for years, but she's just received a very large insurance payment from her husband's death and is retiring. Wanting to give her family, especially her young grandson, a better life, she goes out and buys a house...in an otherwise exclusively white neighborhood. The head of the homeowner's association (essentially) comes to visit them and offers to pay them a substantial amount of money to not move into the neighborhood, because segregation isn't officially a thing and they can't legally stop them from moving in, but they don't want them there. There's a lot more that goes on in the play, and I highly recommend you go and read it, but the point is that there is nothing sexual or titillating in the entire thing. The closest we get is a scene where the daughter (Beneatha, a college student) is gifted a traditional African dress from her boyfriend, who's Nigerian, and he shows her how to put it on over the clothes she's already wearing, and maybe the scene where the daughter-in-law (Ruth, a laundress) accidentally reveals that, having found out she's pregnant, she's planning to have an abortion rather than bring another child into the world/have another mouth to feed.
It's not pornographic. But someone didn't want it taught in schools, so they called it that to get it banned.
It's so easy to twist labels. If you, a liberal, agree that books with X trait are okay to ban, the people who don't want books to exist will find a way to say they have X trait, and then what are you going to do, admit that you like that sort of thing? Sicko! Freak! Pervert!
You don't have to like the book, or the author, or the topic. But if you're advocating for banning them entirely, you're functionally a conservative.