If the kids are fat,it is the parents' fault.If the adults are fat,it is the adults' fault. There are healthy choices even at the fast food places.Don't biggie-size everything,skip the extra cheese,buy the salad,skip the fries at least half the time,park in the far corner of the lot and walk a little more.
The counter lady who fixed my toast,scrambled eggs,and sausage yesterday is worried about her brother who is about 5'6" and weighs 400 pounds.But when he visits ,he insists on not one,but two or more samdwiches. He becomes angry if not given all the food he wants.
Ultimately it is personal responsibility.
Unless that guy has a glandular problem, he needs to be slapped.