People always act like being able to extradite and prosecute for a crime with a connection to your country is some sort of completely unprecedented, made-up-on-the-spot assertion of ownership of the entire world.
But it isn't. If the guy were in the US and had done something illegal and involved Greek citizens or a Greek company, the US would almost certainly extradite to Greece to let them prosecute him. Extradition treaties, and jurisdiction over crimes that involve a country's citizens or other entities of that country's laws (such as corporations it's chartered) are incredibly normal bog-standard boring well-established concepts in law. Nobody should be surprised that this guy is getting extradited.
So: can Thailand extradite you if you happen to say something about the king? Nope. And that's not even close as an analogy. What if you printed a bunch of insulting leaflets and mailed them to your colleagues in Thailand to distribute, and also wired money into a Thai bank to support the campaign, and also hacked some Thai-hosted websites to put up disparaging messages, though? Would you be willing to admit that at least some of that creates a crime under Thai law that you committed, and that elements of what you did took place at least partly in Thailand, thus giving them jurisdiction and a reason to extradite (though extradition often requires both countries to view the act as illegal under their own laws, so the extradition is unlikely to succeed)? I'd hope you would.
But this is HN, where we clutch our pearls and gasp any time the real world teaches us that "But I did it on the internet! There can't be jurisdiction for the internet!" isn't an argument accepted by courts of just about any country.
But it isn't. If the guy were in the US and had done something illegal and involved Greek citizens or a Greek company, the US would almost certainly extradite to Greece to let them prosecute him. Extradition treaties, and jurisdiction over crimes that involve a country's citizens or other entities of that country's laws (such as corporations it's chartered) are incredibly normal bog-standard boring well-established concepts in law. Nobody should be surprised that this guy is getting extradited.
So: can Thailand extradite you if you happen to say something about the king? Nope. And that's not even close as an analogy. What if you printed a bunch of insulting leaflets and mailed them to your colleagues in Thailand to distribute, and also wired money into a Thai bank to support the campaign, and also hacked some Thai-hosted websites to put up disparaging messages, though? Would you be willing to admit that at least some of that creates a crime under Thai law that you committed, and that elements of what you did took place at least partly in Thailand, thus giving them jurisdiction and a reason to extradite (though extradition often requires both countries to view the act as illegal under their own laws, so the extradition is unlikely to succeed)? I'd hope you would.
But this is HN, where we clutch our pearls and gasp any time the real world teaches us that "But I did it on the internet! There can't be jurisdiction for the internet!" isn't an argument accepted by courts of just about any country.