What if people used a de facto whitelist of IP addresses locally mapped to names in, for example, /etc/hosts? This is how the internet worked in its earliest days, after all. I'm not saying this is a good idea, but it's interesting because it also serves the interest of Google and Facebook, so they might promote the technique. Since people will only be able to see content from a small portion of the internet (the part they have in their local file), and would give content hosted by the big players a huge advantage. It would also have the interesting effect of making "raw IP" addresses more visible, and special, easily remembered IPv4 addresses more valuable!