The next step now is to install surveillance in fast food restaurants, that detects people who are already too fat and automatically sets off an alarm. The fat person is then guided out of the restaurant by two tall, muscular men with sunglasses and a Russian accent, telling him to never come back, because "We know where you live".
Seriously, Americans don't get that much fatter, than everyone else in the world, because fast food restaurants offer meals with lots of fat and calories. You can easily get the same amount of fat and calories from every other traditional restaurant, where you have to wait to be seated. As a matter of fact, the most common and most popular kid's meal in about every restaurant here, is a currywurst with french fires, drowned in mayo or ketchup. I really do believe a Double Whopper is healthy nutrition compared to that.
And if seduction is the issue here, how about banning candy and chocolate from supermarket cachiers, because kids can see them and pester their parents, until they get one? Why the heck are they concentrating on McDonald's and other fast food restaurants?
If you're looking for someone to blame for wrong child behaviour, then blame the parents for being too stupid or lazy (or both) to teach their children how to eat the right stuff and for the inability to say "No and that's final" to their kids, when they're grizzling. If fast food restaurants would be the source of all evil, then every nation in the world would host the same amount of fat people.
I guess I said it already occasionally on this forum but my eyes were opened, when I sat in a diner near Dallas/Tx., and an enormously fat man (about three times my current size) squeezed himself onto a bench, ordered a cola and then started pouring sugar into it like a madman.
It's not in the food -- it's in the heads.
Besides, I grew up almost completely without fast food (there was no McDonald's in my home town until 1995 or so) and still got fat -- just by eating canteen food, that was made for infanterists and doing long, boring night shifts and no sports. And I wouldn't dream of blaming anyone else for this but myself.