The use of scootypuffs by fat people in the UK is fairly rare. We even do our obesity epidemic on a smaller scale than our American friends. Not that fewer people are obese, simply that 400lb+ ultra-deathfat is not something which I've ever seen. And I grew up in a place where unhealthy diets and other factors lower life expectancy so much that it actually genuinely baffles modern medicine. I can see how setting up a town with walking and cycling at their heart would help healthy people to stay healthy. It would not directly combat the obesity epidemic but perhaps act like those walled cities to keep out the zombies/titans/other madness one sometimes sees in post-apocalyptic films.