> A particular bookseller choosing not to sell incest erotica does not constitute a book being "banned" or "censored", which only apply when the government forcibly prevents every bookseller from selling particular material.

Going by that logic, to "effectively" ban the book while not "technically" banning it, the govt just needs to pursue the top few channels to stop carrying it. Book will be effectively unavailable and everyone's conscience will be clean.

> I wouldn't sell incest erotica either, and that doesn't mean I ban or censor books.

But you would make that clear to everyone before starting to do business with them, right? Or if you decided to change your stand one day (which is quite plausible since things do change with time), you would perhaps offer a better reason then "Because I can"?