It does not make sense: you would need region-locked browsers. That's already an impossible target. But then how would you deal with people just using proxies,

It does not make sense: you would need region-locked browsers. That's already an impossible target. But then how would you deal with people just using proxies, VPNs, ssh tunnels? It would just be easier for a government to block these sites at the ISPs as the article mentions and even that could be circumvented if the site is in another country.