this is not any problem if we Pass kyc on trusted casino site . and which site become active for long time and which site is popular . but i am afraid to pass kyc for new site . i think it can use our personal document for any illegal purpose.
Who says Old sites cannot do anything like that? who will find it happening ? though they are being trusted this does not take the reality that any leakage may happen as well.
but of course those sites are more trustworthy than new sites.
But KYC requiring or not? who cares as long as it has been proven to be legit and paying so lets play on it.
I believe, trusted old sites don't gather your personal identifiable information. They use third-party services for KYC, and not just
any services, but trusted and reliable ones. There you are checked by robots, not by humans. All your data is encrypted, so even if a leakage happens, you are not in any danger.
But, of course, all this applies to you if you are a regular person, not some big money launderer. There are many thousands of blacklisted people, and what the robots are doing is they are checking whether or not you are in the list. If someone feels he/she can be in the list, then KYC can be a problem for them. For other people it's not.
So, answering the OP's question, I would rather register in a casino with KYC and added benefits than in a no-KYC-no-bonuses one.