>>67704762
Actually you know what, I'm going to spell it out for you seeing as you haven't figured it out by now. I'll use your reddit spacing so you can understand.
Lets say a person called dumbass gets his ass permabanned for posting CP. Dude gets his pc fingerprint swiped, and banned. Fingerprint added to his ban.
Dumbass has the brilliant idea of deleting cookies, resetting browser session, changing his IP, and posting new images. But what he doesn't know is the fingerprint will still match him.
Now when he goes to post, the server goes "Hey i know this guy", tempbans his IP (doesn't need to be a long ban, just like a 30 second ban). Lift the ban on the old IP and apply it to the new IP. He can keep changing IPs and we keep shifting his ban. As a failsafe keep the last known IP banned incase he tried a new PC, then BOOM add that fingerprint to his ban.
TLDR match IP to fingerprint, fingerprint to id, ip bans dont need to be permanent when fingerprint bans are, use your brain