As I mentioned in my other comment, that cuts down the potential of impersonates from 10s of millions to a tiny number. Or incredibly motivated people.

And it easily solved by taking it in the verification process. If you are getting verified and you have the same name as an existing verified account, its not that hard to verify that they are not trying to impersonate the other person.

You are cutting down amount of cases by 100000x.

I would also imagine that it's trivial to create a fake passport that passes inspection once it's been passed through a scanner, stripping all the holograms and stuff off. That might be illegal, though I'm not sure if it's only the context of using it for Twitter.

I mean if a country doesn't have working system of identification its not for twitter to fix.