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.
IP address is the most solid proof for multiple account connections since we are on the internet which means there’s no other way to identify our identification. KYC should be one of the solution but we know that it can be faked through services that offer KYC verification.
IP connection and device use is the most common evidence casino use to detect multiple account. You will never have an issue to multiple account if you play fairly without using any tools that will lead you to use same IP address to other players on that specific casino.
Anti-fraud IP tracking and device fingerprints help, but it is never as airtight as you might think. VPNs make the entire "IP equals identity" claim a complete mess cause you are pooling hundreds or thousands of users into the identical online mask. Add in mobile carriers or ISPs that recycle IP addresses, and suddenly two unrelated gamblers can look like one. I understand that it is a rare coincident yet in less than one percent, it can occur
Casinos are not ignorant of this, of course, so they do not depend only on IP. It must be layered: fingerprints of web browsers, identification of devices, overlaps in payment methods, behavioral patterns (betting patterns, log-in patterns). Next we have suspicion brought about by correlation. Eventually their liability is greater than what you feel convenient