One amusing possibility about this approach is that if Twitter implemented it and governments decided that they didn't like Twitter's default censorship regime, Twitter could say "That's fine, just provide your own censorship system and write a law forcing that system onto all users in your country."
I suspect at least some governments would be reluctant to incur the financial and political costs of maintaining their own (inevitably imperfect and controversial) censorship regime, and would then find it harder to act at arms length and say "Twitter has to do more" as they do currently.
One amusing possibility about this approach is that if Twitter implemented it and governments decided that they didn't like Twitter's default censorship regime, Twitter could say "That's fine, just provide your own censorship system and write a law forcing that system onto all users in your country."
I suspect at least some governments would be reluctant to incur the financial and political costs of maintaining their own (inevitably imperfect and controversial) censorship regime, and would then find it harder to act at arms length and say "Twitter has to do more" as they do currently.