AI bots and Pressbooks

I am preparing my first Pressbook. I am happy to offer my book open-access to readers who can use it, but do not want to give it to AI billionaires to chop into fragments of “content” for training. How are current authors dealing with this problem? What strategies does Pressbooks have, or what are in development?

I was considering making it “private,” behind a registration page. Any other ideas?

Thanks!
Janet