I don't see the point in guessing how protected your personal data is. I perfectly understand people who don't pass the KYC because as I told many times before there is a big enough number of sites that offer users the game of poker without the need to provide their personal data which allows to completely eliminate the risk of leakage of personal data to the black market.
Here is an example of one of such sites - https://t.me/pokerton_chat_en (not advertising)
To me, we are talking more about the future here. I think KYC will be required everywhere in the nearest future. Maybe some shady sites will not require it, but most gamblers will be avoiding those sites for obvious reasons.
Can't they be different persons in different parts of the world and still be doing this? When I play I always allow that possibility, and that's why I prefer tournaments with several tables at least to minimize the chance of such cheaters sitting with me at the same table. In short, in the current world KYC is hardly an effective way of avoiding collusion.