Catcher In The Rye Banned

Is the Catcher in the Rye should be banned?
According to Sova B Dawn, “The novel has long ignited disapproval, and it was the most frequently banned book in schools between 1966 and 1975. Even before that time, however, the work was a favorite target of sensors.” (Dawn) Whitfield also documents that “In 1973 the American School Board Journal called The Catcher in the Rye the most widely censored book in the United States." (Whitfield) Why people, especially parents, eager to place the Catcher in the Rye, the classic story of a teenager quest for maturity in the banned book list?
“In late 1980, Mark David Chapman stuck a copy of J.D. Salinger's book in his pocket as he stalked and then murdered John Lennon. Before the New York police arrived,
“One of the most endearing qualities of the teenage protagonist is his empathy for other people, especially those whom others reject.” (Edwards) Ackley, for example, everyone hates him. He has "sinus trouble, pimples, lousy teeth, halitosis, crumby fingernails." like June Edwards concluded from the novel. (Edwards) But, says Holden, "You had to feel a little sorry for the crazy sonuvabitch." (Salinger) Holden is the only one who does. Though Ackley irritates him, he never turns him away. What’s more, he even invited Ackley to see a movie with him and another boy because he knew he has no friends at all and no one else would hangs out with him. The concern about other people Holden showed doesn’t come very often in the surroundings at his age, which proves that the Catcher in the Rye’s morality.
Holden Caulfield claims himself hates people who behave one way in public and another way in private. “Except if some boy had little old funny-looking parents…… if a boy's mother was sort of fat and corny-looking…… then old Haas would just shake hands with them and give them a phony smile and then he'd go talk, maybe for half an hour with someone else's parents.” (Salinger) One of the most important qualities about morality is against hypocrites. Being genuine and honesty towards others is what Holden believes in and he actually did accomplish
Aside of his own innocence, Holden would like to “catch” other children’ innocence. When Holden comes home without telling his parents just to see Phoebe, he tells her that what he would like to become more than anything else in the world is a Catcher in the Rye. “Anyway, I keep picturing all these little kids playing some game in this big field of rye and all. ……And I'm standing on the edge of some crazy cliff. What I have to do, I have to catch everybody if they start to go over the cliff ……I have to come out from somewhere and catch them. That's all I'd do all day. I'd just be the catcher in the rye and all.” (Salinger 173) The innocence and simplicity of children holds an especial appeal for Holden as well. For instance, toward the end of the book, Holden's frantic desire to erase all the "Fuck you" s scrawled throughout the city and around the world is related to Holden's fear of becoming an adult, his disgust with the vulgarity of the real world, and his need to protect the innocence of those younger than him, just like his sister. One cares so much about protecting others from falling to the “cliff” must be a genuine and virtuous