Don't be such a moaner, Lisa

Schools are having them removed from classes and libraries. They aren't banned. You can get them if you want.

I'm right that you can still get them and you're right that they are banned from classrooms and school libraries.
So, "Banned" doesn't quite land. I know what you mean, though.

I understand that. But the fact you can order them and read them means that they are not banned. Schools and libraries don't have many books. They aren't banned either. They just don't have them

They aren't. They can be ordered. "Banned" is their brand, I suppose.
They all have a history of subversiveness.

Well, according to the poem's lyric structure...

Promote
Promote your book
Promoting books is resistance

We're gonna need a bigger boat