These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Catcher in the Rye
Alternative Character Interpretation: Holden is either a shining beacon of morality amongst all that was wrong with the 1950s, or a whiny prototype Emo Kid who refuses to let himself see anything good in the world, or someone who has good insights and potential but is weighed down by cynicism and bitterness, OR just one of the first examples of teenage disillusionment in a post-World War II world. Or you think he's telling you to kill pop-culture icons (see Loony Fan in the Trivia sec). It really depends on the reader.
Hilarious in Hindsight: Why is this book so frequently banned? Because it uses the word "Fuck"- during a scene in which Holden, discovering it scribbled where grade-schoolers can see it, tries to scrub it out so it can never offend anyone again. Considering how much Holden swears BEYOND "fuck," this is somewhat justified. However, this does miss the point, considering how iconic the book is.
The underage protagonist spending the entire novel smoking, drinking (when he can get served), hiring a prostitute, having a generally negative attitude AFTER being kicked out of school might also have something to do with why people ban it ...
The infamous passage in which Mr. Antolini strokes the forehead of a sleeping Holden. Even Holden himself is rather disturbed, fleeing Mr. Antolini's house right afterwards.
Antolini's inquiries about Holden's girlfriends and the fact that he calls Holden "handsome" as he wishes him goodnight could be read as flirtatious advances as well.
Carl Luce, who was said to be always grabbing guys' butts, and somehow seemed to know if anyone was gay. He was most likely a case of Anything That Moves.
Note that, for a long time in America, this could have been Truth in Television; spotting a gay man based on behavorial patterns (that is, by any way other than catching him having sex with a man) was seen as a surefire sign that you were gay. Gaydar was one of the main reasons so many people were expelled from Harvard in the 1920's, even if they were into women or Anything That Moves.
Holden refers to how attractive Stradlater is all the damn time, including calling him a "sexy bastard" at least twice (though, as noted on the main page, this is most likely the result of Have a Gay Old Time.
Hype Backlash: Considering its reputation as both one of the most controversial and most loved books in history, it has lead to quite a few people being a little underwhelmed when they read it the first time.