[vxNsr]

Nice idea.

The main issue is the common-ness of last(or sur)names and once you move away from using the last name as the domain everything becomes a lot less effective... even if you had it drill down to your neighborhood, I know many people with the same last name who live on the same block... two houses away, so you would always need to use some combination on firstname+lastname+random-integers

Not to mention a lot of people don't want even their most basic information broadcast to the outside world.

I like the idea, but as you quasi-mention in the article it's unlikely to ever happen, or at-least under circumstances similar to the ones we have now - more than one government for the entire world.