> Could this be used to protect them against having to implement sanctions against various countries if they don't actually know where their users are from? No

> Could this be used to protect them against having to implement sanctions against various countries if they don't actually know where their users are from? No. That you don't know where an export-restricted good is going when you sell it or give it to someone is not an excuse. If you gave them the stuff and they take it somewhere embargoed, it's still on you for supplying the goods. I will bet good money that a court will not be impressed by your deliberate choices to avoid being capable of meeting your obligations under the law. That's the sort of clever hack that makes judges quite angry, rather than the sort that makes them go "You got us!".