In the movie, the humans of Earth have all moved onto a ginormous spaceship where they plan to live until Earth is once again 'livable'. Everything they need is available on the ship (yes, lots of food) and the people get around by sitting in one-person padded-chair hovercraft vehicles. So, yes they are 'drawn' as being overweight as they never get out of these floating recliner chairs.
Apparently some people do not see the satire going on in "Wall-E", which very cleverly goofs on our consumer culture and laziness.
The FPT is going to refrain from singling out anyone here but there are self-proclaimed "Fat Pride" activists & authors who are blinded by their bias and taking this way too seriously.
Some individuals are upset about how 'fat' people are depicted in the film, believing that "Wall-E" is fostering anti-obesity hysteria that can be compared to the perfect human eugenics policy of Nazi Germany. Others also argue the film sigles out fat people as the catalyst for the demise of the earth and mankind.
The Fat Pride Times does not agree with any of this nonsense, and we love this future classic movie. It is a great love story with a very clever scenario that is about everyone in our culture and ponders the what-if questions about the future of Earth and its people.