I'd say this is a problem with the seller's communication, not the use of the book. If the seller didn't specify that the book was marked up, I agree with your sentiment. The act of writing in a book and selling it isn't the issue, but setting false expectations to whoever you're selling it to is.
> and it's a shallow way of taking notes to begin with
Are we really going to speak down to how someone uses a bunch of paper bound together? That's how they wanted to use it, which is cool, it's just not how you like it.
> and it's a shallow way of taking notes to begin with
Are we really going to speak down to how someone uses a bunch of paper bound together? That's how they wanted to use it, which is cool, it's just not how you like it.