whilei admit that im larger, im not that large so its hard to say that in comparison. i am 5'8 and 250lbs. larger than what i should be, but not quite that large to where i would need say a bigger vehicle. i drive a s10 actually and have an iphone 4. im not fat enough to need a larger vehicle, because i dont allow myself to be. and note that i said large, not obese lol.
and it is perfectly fine to say that someone larger like that would need/have a bigger phone or car. think about it, they have larger hands so they would want a larger phone to better fit it. and the car thing is pretty obvious.
i realize that obesity is a problem. a legitimate problem comparible to alcoholics and drug addicts. but i dont feel sorry for them either, unless they are actively searching for help. you control what you want your life to be for the most part. more than likely, they guy, or girl (i have no idea what gender it is, and im not trying to be funny with that, at the moment) probably let themselves get that fat, and i highly doubt they are doing anything to try to change it.