10-02-2014, 08:00 PM
Yes, some people DO have static IP addresses. And some people have "sticky" IP addresses, i.e. the ISP tends to give them the same one but it's not guaranteed. And some people will appear to have the same IP address for several days as they have maintained a constant connection with their ISP during that time. But some people do not and many will change their IP address over the medium and longer term. In other words, it's not wholly reliable to ban someone by IP.