You could complete KYC and still get ban by some casinos. This is just too complex to figure out and most time I don't like it when a casino try to detect multiple accounts only through AP address which I know can always look the same if we must judge from that.
Casinos have different tools they can use to detect and suspect multiple accounts on their casinos and I don't opt in to the use of IP address. That is an old pattern that is not so effective especially in a school environment where students connect to general WiFi to complete assignments and do other things.
Correct. Most casinos ask for a KYC before they ban a player. There is a simple reason behind it. Let's say they found some offense, which is why they have to ban the player. If they ban the player without completing the KYC, the player would create another account, and they would be able to submit their document to verify their account. However, once they complete the KYC from one account, they cannot use the same document to verify another account. So, the casinos actually ask for a KYC verification before they ban the account. There is no guarantee that a casino won't ban you if you are a KYC-verified player.