[jgust]

I feel like you could extend that argument (not that I agree with it, personally) to foods with HFCS or tobacco.

[summerdown2]

The difference I see is that I'm not personally at risk from someone chomping down on fast food. But I may well be at risk from someone driving unsafely.

[lawless123]

A lot of countries ban smoking inside non-residential buildings e.g pubs out of concern for non smokers.