But they likely will reinforce much later when you least expect it, mostly when luck hits you so hard that you win a very large amount of money and requesting withdrawal from the Casino, then and only then, the casino will go back and dig out your past sin and reasons why they can't grant your withdrawal request..
Gamblers ought to be learning from other gambler's experiences and avoid whatever will end up being a problem for them in future, casinos are out here to make money and it's mostly painful for most of them to lose huge amount to users, and when they see any opportunity not to pay a user, they quickly will grab it.
They have all things about a user activities on their database and if you did suspicious things for exploit their systems, they will catch you sooner or later. Legit companies will terminate your accounts immediately but scam ones will delay it and let you playing more and more until a day you win big and submit a big withdrawal. Then, it's perfect time for them to pull different cards against your account but mostly you will fail with your appeal.
They have enough data against your account and the best is only appeal for withdraw your initial deposit, nothing more.
Here I am not saying about Duelbits, just general thinking.