What would happen if one of the Hogwart's Houses started using the Matrix to fuck up and control the other houses? Of course you would get something that wants to be a society based on the insane asylum from One Flew Over the Cuckoo's Nest! Follow Tris as she does little but cower in the face of adversity and pine for her boyfriend in Insurgent.
The only instance of the word "banned" coming up in context of this book online was for people threatening to remove comments from comment sections of articles where people took this teen novel too seriously.
That being said, it does contain violence, gun use, parental abuse, distrust of authority, distrust of smart people, borderline sexual situations, and long passages about dumb teenage lust that sounded okay when Shakespeare wrote them 400 years ago but kids today should know better.
"Dances and Dames"
Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0