gambling is a little bit different, as you have to pay and receive money (easily enforceable bans). But here we are talking about a free service which is also offered by many foreign alternatives (which of course are not going to cooperate.)
"Writing is thinking. The clearer your thoughts, the better the output. It's kind of the main reason why writing is an essential part of the learning process (especially in schools)."
"However, we want to be clear that this edition is only free to read, look at and listen to online, and this posting does not transfer any right to download all or any portion of the book The Feynman Lectures on Physics, its photos or tape recordings, for any purpose."