They'll always find a way in. You can ban IPs, you can ban free e-mail, you can ban whatever but they'll always find a way in, even if it's just a pocket ZIP drive and a 24-hour Internet cafe. There's no way of keeping them out except one, the one that most people on this foruma seem to adopt anyway: personal intolerance. Every time I see a 'Whare kin i git Viki 2 4 free' post, it's generally answered with a polite 'You can't; you can buy her at Daz; you're about to get banned' and then the thread is locked. What could be more discouraging? I think this works as well as anything would.