People have strange ideas about ips, here in Thailand most of us are on shared ips anyway, it is quite common on servers to stick 100 different domain names on the same ip, cheap maxnet connections are shared between several thousand people on each ip, so don't put too much thought into ips otherwise you will be chasing imaginary ghosts, one of the German proxy servers serves 750,000 people perday, yep, they are all seen as being on the same ip, so unless you know about proxy servers and how to recognise proxies which a lot of the time is impossible, ip means fok all.