Those who have read Catcher In The Rye, do you believe it should be banned from certain age groups?

I’m writing a paper on this topic, and I need a few additional sources to back up my personal opinion.
Is this considered homework help? I’m not sure..
So.. Do you think it should be banned? If so, what age group/grade level do you think is “ready” to read this book? Why?

And.. I’m not sure if this is another question already.. but how does one cite Fluther?