What can HN readers do about that? Off the top of my head, you could contact the reporter, and make a website (in Spanish) with the good farms, and the bad ones

What can HN readers do about that? Off the top of my head, you could contact the reporter, and make a website (in Spanish) with the good farms, and the bad ones, so at least a few farmers could avoid the bad ones. Or let the farmers post reviews and ratings. Excellent strategy. BTW there's a name for the practice of avoiding produce from farms with consistently bad ratings. It's called "boycotting."