I think your best off talking to Jayfella. I know ages ago (back in April) when he was doing the first Autoposter he had a whitelist and you could see the names on the whitelist. He was also developing how webmasters could have their own whitelist to prevent people using his poster on your site especially ones who didn't follow rules on your site. Don't know what happened this. Your best of talking to him about blocking the person at the source, as Hugo (as an example) could just create a new account and change IP.