When that happens to you, send me the 2 digit code of the place you are at. I remember getting the email I think and it had three names of places, the email scrolled down off the page before I had time to look up what ISO country code they related to. and as often happens, then I forgot about it. It's best to let me know the official country code as that is what I have to work with and I can usually turn it around immediately.
Yes, it is by design, most countries either willingly allow or don't prohibit scams, frauds and spam to the US. The countries that attempt to do something about it, we allow by default. We block those that don't. It saved literally billions of page accesses a month from people with ill intent. It also blocks some people who should have access, that's why I need the code.