I like the Aussie poster. Wish the U.S. Would take such a stance. What Australia has primarily going for itself is location. Having been to Australia, I can tell you that it’s a loooong way away with some of the most trecherous oceans in the world surrounding it. So, there’s few if any “boat people” likely to make it there.
Translated to Spanish with a different background, that needs to be reproduced in pamphlet form and air-dropped by the millions across northern Mexico. Of course, this presumes that we have a law-abiding President that would act accordingly. Australia is specially blessed to have political leadership with spines and a respect for the law.