Sorry but I disagree with you, illegal or legal casinos are no tool to gamblers becoming addicted to gambling, gambler who are addicted became addicted on their own based or as a result of their own decisions and indecision.
Yes, that's true, the casino won't make someone addicted to gambling but it's ones own actions that either make them addicts or not. Those who gamble a lot often end up as addicts and those who gamble in moderate way doesn't get addicted at all. That's why one should learn about gambling responsibility so he/she won't get addicted to it.