I was just thinking about the people, signing up for online gambling without knowing the consequences of their actions. In many countries, online gambling are not allowed. So even if you win the $$JackPot$$ at these Bitcoin Casinos online, you would not be allowed to withdraw that money, legally into fiat.
A lot of these casinos knows this, but they still accept your bets. They do not have to pay you, if you signed up with their service.
So how many people know their laws and what is allowed in your country regarding online gambling?
If they can withdraw and convert BTC to USD in small amounts, I dont see a reason why they cant convert and withdraw in bigger amounts.
Although there is this anti-money laundering law, the amount of money coming from gambling is not that big to be investigated by those guys.
If you can log-in, deposit, play and withdraw, then you are good to go. Countries will block the site if its really illegal.