No one can censor you from bitcoin. Everyone is allowed to trade and hold bitcoin and no one can stop that. Your own government might crack down on you if you do illegal activities to earn bitcoin but bitcoin itself won't censor white money and black ones. Bitcointalk.org is a forum to discuss about bitcoin and other cryptocurrencies. It's owned by some people and the rules and censorship occurs according to their desire. If you want to discuss freely about bitcoin, you can start your own forum.