There are multitude of reasons why a gambler may be banned in a casino. Whether it is because of suspicious activity or misconduct, the casino doesn't just ban or restrict a gambler for no valid reason. But it seems like these restricted gamblers have found a way to still gamble. There is a group of people who would "borrow" the identity of others to continue betting. They would use other people's identification documents such as passports or driver's licenses. They would give it up once the rewards have been collected.
Actually most people does that to their friends and family and not not to everyone, because I don't see a possibility for someone to do such thing to somebody who you dong know, or you can't just see somebody for the first time and ask for his id for kyc. Most people who gave out there doceument never know the purpose of why it is collected. If they know they will not give. But my advice in regards to this statement, is that we should be careful when people ask us concerning our sensitive document or any important information relating to us, for security reasons because no body know the plan of the next person.Because even if they ban the ip address, gamblers can still use a vpn. Are there other ways that a casino can ban or restrict a gambler for good?
You sound as if you are working with gambling site to find a permanent way of blocking sturbon customer who find way to bypass the ban and continue, lolz anyway I don't know you can check the next comentor. 
