I feel that wouldn't be a concern in this case, given that the goal to begin with is to block the majority of the planet on a geographic basis

Sure, but then you have the really interesting challenge of trying not to block your next door neighbour who’s accessing your service via tor/satellite.

Then they aren’t your neighbor if their route goes half way around the world, are they?

Depends on the satellite; the ISS orbits at 211 miles, which means that it would be close enough to send a 500-mile email if it's flying directly overhead. :P

Or Wi-Fi, I've had atrocious pings between two systems on the same AP https://www.benkuhn.net/wireless/