I don't see how you could enforce a hostname binding to some real world identity. Hostnames really need to have a non-ambiguous mapping from a name to a computer (more or less), but real world entities don't have that, without using really cumbersome indentifiers. Many natural persons share a name, so how do we decide who gets a hostname based on that; the same is true of corporate persons -- there are many that share names. Even if there was a way to disambiguate these things, it seems unlikely that the entity in charge of this would also want to rub a public registry -- so how do you make that work.