okay, since we’re talking about immigration, it makes sense to talk of higher level libertarian solutions everyone will ignore.
if you don’t know Bitnation yet, be sure to check it out. it’s, quite simply, an free associative nation. deterritorialization taken to extremes.
now, the problem of immigration is a problem of knowing who to trust. in modernity, “institutions advance by substituting for trust”. bit-nations (the one extant, and the many yet to come) do that for societies: you can anonymously associate to a network of mutually reassuring parties.
of course, if you took to Bitnation’s site, you’ll see they are merely the network, not the space. some people within the network supplies it with a few embassies across the world, that can be accessed by their members (for a fee). but this could be made by another service provider, such as a sovcorp. we’ve been talking a quite lot about them lately.
couple these two concepts: a bit-nation makes a deal with a sovcorp, so that the members of such nation can access (for a fee) the sovereign holdings of the sovcorp. rent a city. various bit-nations can hire the services of various sovcorps, creating an effective market for sovereign services. this is almost ancap proper, come to think of it.
this solves the problem of immigration even more easily, as I’m sure you realize.