It's generally easy to avoid smoke, or at least you're aware of it (in case of someone smoking nearby). Meanwhile if you eat at a restaurant, takeout, etc, you

It's generally easy to avoid smoke, or at least you're aware of it (in case of someone smoking nearby). Meanwhile if you eat at a restaurant, takeout, etc, you don't know what they put in your food. I think it would be fine to allow it in the cases where it's properly and visibly labeled, and ban it otherwise. But it would be hard to inspect all restaurants and so on to check they are following the law.