Pretty much all bulletin board software allows for IP address checking and blacklisting, vBulletin (what this site is using) included. Every post is logged with vBulletin, phpBB, IPB, etc. and you can definitely block by IP address or IP range. The only thing is it's easy to change your IP address and blocking an IP range could block out potential members that live around George with the same ISP. He could just use a proxy anyway.
Yeah, that really makes sense. I actually didn't think of that.
Sorry, this is robably one of the few times i'll say something really negative, but he is stupid. I have no patience for stupidity.