I’ve written a comparative article on plausible intervention for human rights in North Korea. The activists I interviewed had already considered running campaigns to discourage travel to North Korea because tourism is an important source of foreign currency for the government. (They can force their citizens to stage North Korean life for tourists while paying them in their worthless national currency, so that they make a large profit on tourism.)
To my knowledge, these activists never pursued that strategy because it may actually be an attention hazard and thus actually increase tourism, and because it might strain relationships with organizations that think that tourists may show North Koreans that other ways of life are possible. But I find that implausible because almost no one is allowed to travel within North Korea (and tourists are even more tightly controlled and restricted) so that it’s always only the same most loyal North Koreans who come into contact with tourists.
But I discuss other more promising interventions in the article. For more detailed, reliable, and up-to-date information you can get in touch with, e.g., Saram as I’m not myself active in the space.
A major factor in my calculus is also that, given enough time, it’ll probably become much more feasible to send non-biological life without any need for terraforming to planets outside of our solar system than to send biological life, so that even in terraforming scenarios the terraforming will probably be limited to just planets within the solar system.