That's why at this point we have to ensure that we are playing in a reputable casino because they'll not gonna mess their reputation just to steal our money. If they have a good reputation to protect, they'll value their gamblers, they'll pay whatever is due and will never use their TOS against the gamblers to scam them.
It's good to choose a reputable casino to register an account, fund the account and start betting on it. At Shuffle.com, people will be provided services, games from a trusted casino and their reputable partners (game providers).
Some gamblers when required for a KYC, they'll just say no and let their funds getting confiscated because in the first place they could not comply the requirements. So them as a gambler, they are aware that one day it'll come, so they enjoy while they can but at the same time well aware of the risk.
If they are legit users, they will not say No, and open scam accusations.
People who say No, usually are cheaters on casinos and they know very well that the casino smells something suspicious before asking them to KYC. So they have lot of fear that KYC will not help them to be verified and withdraw cheated money after that.