>allowing him/her to identify people
he does have tools to identify IPs which are repeatedly and consistently fucking with the dough and these IPs have all been banned.
>If they reset their IP, then their hash doesn't change.
Have you been dropped on your head as a child? That is literally how the IP Hash works. Hashes in general work like that. You have input data - the IP address - and you calculate a hash value out of it. If the IP changes, the Hash changes. I can literally prove that by jumping on a VPN right now.