The casino will first observe you closely because they want to learn from your play and improve their own operations. If you break any laws, they’ll report you and have you arrested and prosecuted. But if you’re not doing anything illegal, they’ll simply refuse you entry.

In some regions, casinos aren’t allowed to block people from entering, but they still can ban you from specific games. The polite excuse you’ll receive is something like: “You’re too good for us, Sir. You’re welcome to play anything except blackjack.