Try turning off your VPN, proxy or tor-exit node. If you are not comfortable taking these off, then you can simply switch it to a new IP and attempt your registration again. Certain IPs have been abused for various reasons and you get the message you are experiencing. This fee will now be associated with the account and will not go away if you log-in on a new IP. You must re-make your account that is receiving this message or simply pay the 1665 Satoshi.
Do you meant to say that an account which is banned from posting vecause of evil IP, will work normal on another clean IP ? I do not think this is possible, once it is disabled, it will work only after paying the required fees, otherwise what is the point in disabling the posting. I hope someone from staff can clarify this.
He meant to re-register again after switching/getting new IP address on your pc
as in registering another new account with new email and new username
do not throw away that proxy-banned account, save the login/pass info
you can always pay the 'ransom' fee batched with your next bitcoin transaction to save fees
