And behavior by behavior. Don't think they'll stop at smoking bans.
It could happen but your assuming that the anti's are only made up of a group that wants to control others. That isn't necessarily true. The group is more varied than that. It includes some folks who do want to control behaviors but these folks alone are not the majority. If they were the laws on other behaviors would also be evident.
In addition to controllers, the current bans are being pushed by true believers that SHS causes harm, folks who just want a smoke free environment and don't care whether SHS causes harm and private restaurants that want a level playing field.
The push for fatty food bans etc just aren't going to motivate the larger majority that are supporting these bans.