Pixar is known for creating fantastic characters that live inside wondrous worlds, but you can't really dig too deep into them without finding something creepy. The Toy Story universe in particular is a minefield of staggering implications. For instance: if the toys are alive, that means Woody and Buzz were probably somewhere in the room when Andy discovered internet porn. Since they can never be seen moving by humans, they would be helpless to do anything but stare at their owner while they explore all the category tabs on YouPorn.
A little less often considered is Wall-E, an excellent movie that is perhaps overshadowed by some of the other heavy-hitters in Pixar's storied catalog. At first, seeing a world where humans left Earth after completely trashing it seems so believable it's kind of boring. But then we see where humans end up.
As revealed almost halfway into the running time, the remaining humans are living aboard a starship that's more like a mall than the Enterprise. The entire population is morbidly obese, spending their time floating from place to place on hoverchairs, transfixed by their screens, barely ever moving. It's not exactly a nuanced take on where humanity is headed, but hey, those hoverchairs look pretty cool.
One thing that is a little strange is the whole food situation aboard the ship. If the human race left Earth, how is everyone still eating? Well, Imgur user TechHazard has an idea, and it's not Disney-friendly. According to an especially disturbing fan theory, the humans in Wall-E are getting fat on... other humans.
I know, the Soylent Green angle seems like kind of a stretch, but TechHazard lays out a pretty convincing argument. Let's look at how the movie explains the food situation.
While consulting the status of the ship with the computer, the Captain is told that the "regenerative food buffet" is "unchanged." Meaning that everything should be running as usual. But there's a weird thing about infinitely regenerating food -- if mankind was that advanced, if they could recycle waste and get infinite sustenance, then why was Earth such a mess in the first place?
Think about it. When we see Wall-E crushing mountains and mountains of garbage, there's plenty of crushed cans and food packaging in the mix.
It doesn't make any sense that a world with free regenerating food would have so much junk left over. Certainly if technology had advanced so far that matter replicators were employed, they could find a better way to clean up trash than send cute robots to crush it all into endless cubes.
So if we assume that the food is being recycled from something, then what exactly is it being recycled from? All three fans of Waterworld -- a movie where urine is repurposed into drinking water -- might suggest that everyone in Wall-E is drinking poop and pee milkshakes. Maybe that's the case, but that doesn't explain why there are so few children on the ship.
Think back to the last time you watched Wall-E. Why aren't there any kids around? In a few quick shots we see a handful of toddlers in a classroom, and in the back you can spot infants in their beds, but that's it. Let's try our best to avoid thinking about how exactly these tremendously fat and immobile people procreate -- the real issue is why there are so few children compared to adults. The size of the nursery is incredibly small compared to the thousands of grown-ups we see zipping around on their hoverchairs.Heck, when a bunch of people are gathered in one place at the end of the movie, we don't see anyone under 20.
In fact, in addition to hardly any young children, there are basically no elderly people to be found. There are some graying and balding, but nobody seems to be above 50 or so. You could probably argue that the life expectancy of sedentary flesh blobs probably isn't that high, but then what are they doing with the bodies?
You guessed it: The young and the elderly alike are being liquefied into food paste for the consumption of the ignorant masses. That's why you don't ever see anyone consuming any food that's not in a cup.
If it's hard to believe that humans would be capable of something like this, that's because they're not. The humans in Wall-E don't have any concept of their toes, much less of what they're actually eating. The ship's computer, on the other hand -- who is revealed to be the villain of the film, essentially -- would definitely resort to this sort of thing. What better way to keep the population numbers in check than cull the old and farm new children for the soylent slurry? It's not like the docile humans would ever find out. It'd be like feeding a pig bacon-wrapped pork rinds.
The whole movie is centered around a message that encourages reducing waste and recycling what's left. In this context, space cannibalism almost fits. Almost.