Comment by margalabargala

The chances of a foreign country extraditing you (or the US requesting extradition) over social media posts is for now quite low, fortunately, though you're right.

Broader point being, in general if a country's federal police are going to be spying on you, if you get to pick the country you should pick the one in which you do not reside and don't plan to visit. For a typical US citizen who is not an intelligence target, the chances of negative consequences from China spying on them is way lower than the chances of negative consequences from the FBI spying on them, simply because the FBI will have nonzero false positives.