People are fond of giving reality TV shit for being fake and scripted, even though a lot of it is just produced, not fake (and there is a difference).
Documentary films–including those that have won awards–aren’t immune from criticism, but the genre isn’t as reviled and demonized as reality TV. In fact, it’s usually the opposite. Perhaps that’s because it’s less visible or its sins are less egregious, or there’s just a greater attention to craft, but either way, documentaries also have to be produced, and sometimes that means what’s on screen isn’t exactly reflective of reality.
Cracked has compiled a list of 6 Famous Documentaries That Were Shockingly Full of Crap. For example, it challenges an assertion in Morgan Spurlock’s Super Size Me that he ate 5,000 calories a day, and notes that college students who tried to duplicate his results didn’t suffer from the same physical problems. Cracked also challenges Bill Maher’s assertions that the Jesus narrative in the Bible was borrowed from earlier civilizations’ stories.
In one item, Cracked links to a CBC list of “notable nature documentaries where scenes were either staged or faked.” Among other things, that points out that Blue Planet had a scene of lobsters spawning that was filmed in an aquarium, and that the bird eaten by crabs in Winged Migration was actually rescued by the filmmakers, who then filmed crabs eating a dead fish.