It is not. It has been banned in the past at certain schools, but it is no longer currently
The past form of "ban" is "banned," and the past participle is also "banned."
Something in the past.
He has never been banned nor limited in any way, past the usual 3 copies per deck restriction.
It is the past participle of "be," to exist.
it has not been "banned".
banned
you developed something something was developing,had been developing I did develop what you told me to.
Banned from what? To my knowledge, it hasn't been banned, and has been on TV.
In the past books have been inappropriately banned in order to keep the people as ignorant as possible to control them better. Other reasons might be that those in authority are fearful that others would be offended in some way or that the book would incite some sort of negative reaction or behavior.
Banned
If you got banned , you did something bad.