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.