It's fair enough to say that a casino shouldn't allow it in the first place and the accounts should be blocked immediately when the gambler creates two or multiple accounts, but why does a gambler have multiple accounts in the first place? If you have multiple accounts, and you hit a big win with one of them, and then the casino investigates and finds out what you have been doing, they have all the rights to ban you or confiscate the funds.
I do agree. It may be written in TOS or just be seen as a fraud and treated as such. Nothing personal for the one who did such things

Casino prohibit people to have multiple account and it was written in ToS but unfortunately, many gamblers doesn't read the ToS and underestimate about that. They thinks that they can have multiple account in that casino and doesn't realizes that casino can do many things with all of their accounts especially if they want to cheat the casino.
After all, casino will know if their members cheat them because they have all record about their members activity so they can check it to get more information about their members. Casino can investigate easily and casino will asking their members to verify their account by sending the other document to make sure they have a real document.
People would really be just that only mindful on about on reading up terms and conditions on the time or moment that they are experience shit situations on which on the moment that they
have been caught by the platform then this is where they would be having those kind of excuses but the fact that they havent read up the terms and conditions on which this is the primary mistake that they had done and this is where you cant do something since its your fault since from the start. This is why its really that important that you should really know on to those terms because on the time that you had missed out then high chances that you might be violating something and you are unaware of that not until on the time that you are experiencing some issues towards them then this is the time you would