Borrowing a document and using it just to fulfil the KYC requirement and making use of the platform is really an unnecessary thing. Surely this is going to create a problem in the long run. Using the KYC of a person from a particular person of a specific country and reaching the platform through a VPN stating the reach from the particular nation will make it perfect. However, when we face some issues, we can't manage and give proper responses to the questions raised by the support team to solve issues.
Borrowing a document from other people to fulfil the KYC requirement is not a good option but some people still use that to get the bonus from casino. They don't think much about the risk that they can get when casino know what they do. Maybe that will not happen in short run but that will cause a problem in the long run. But those people will not care because as long as they can get the benefit from casino, they will still do that and even they may reopen more accounts and use the other people's document to chase what they want. That is why the cheat gamblers will always found the way to stay at the casino and get the benefits of that before the casino found them.