Country states prohibit city zip library

[eluser]aquary[/eluser]
Unless you have a way to control people to always write in a good name, you might have some problem when another user "intentionally" put in his address incorrectly, like "Blazil", to access profiles that normally would be prohibited. :-)

The safest way might be using a real city/country database..... but that one is quite a big table (around 2 million records) and it doesn't contains every town in the world yet. USA maybe, but not in some regions like mine >_>