I'm talking about the knowledge people "steal" by reading. LLMs and humans both absorb knowledge by reading. You want to tax using that knowledge that was absorbed.
This reminds me of what happened around the time I hit year 3 in school. You could no longer buy used textbooks like everyone did from time immemorial because there was online drm making sure you had the latest textbook to take the latest quiz. I'm sure it's got even worse in the 20 years since.