Yeah, but its still using rebuilt HD assets which make it look way better than the original game its based off of.

That’s the HD remaster that came out like 10 years ago. They most certainly did not make that on windows 98.

If a user is banned on their home instance, that ban is federated out to all instances. If a user is banned on a remote instance, they’re just banned locally on that instance, and their account remains active for all other instances.

They’re likely some remote users who have interacted enough with your instance to be federated over, and then banned on their home instance.