Honestly, morbidly obese people operating and traveling in vehicles it's a huge safety issue.  Brakes don't work as well with all that weight.  Suspension will blow out faster increasing the chance of a crash.  The motor is working overtime and probably burning oil within 10k miles because you know the AC is cranked and that pedal is on the floor trying to ascend even the most reasonable incline.  Tires are going to wear unevenly if it's a single fat commuting every day.  I could go on and on and on.    Fat people are fucking dangerous.