This assumes that your USB stick doesn't get checked on the airport.
Secondly, people can exactly not trust the data because there is no way to trustlessly get those hashes to begin with from within IPFS and you get back to normal HTTP which... is censorable.
Lastly, this also assumes that the one running the node is not arrested either.
>Another way to distribute once the data is within China is to do it via private networks built with cjdns or similar
Which again, assumes cjdns and other methods do not get people into possibly lethal trouble or aren't censored/outright blocked to begin with.
edit: You also forgot about the government blocking IPFS within their own country.
Secondly, people can exactly not trust the data because there is no way to trustlessly get those hashes to begin with from within IPFS and you get back to normal HTTP which... is censorable.
Lastly, this also assumes that the one running the node is not arrested either.
>Another way to distribute once the data is within China is to do it via private networks built with cjdns or similar
Which again, assumes cjdns and other methods do not get people into possibly lethal trouble or aren't censored/outright blocked to begin with.
edit: You also forgot about the government blocking IPFS within their own country.