It appears that, at least in California, one medicinal pot supplier has chosen the smart as its delivery vehicle of choice:
California sprouts 'green rush' from marijuana - Yahoo! News
Never mind the obvious benefits of the smart as a delivery vehicle for small bagfuls of this type of cargo (high gas mileage, ability to navigate nimbly through traffic, not likely to draw a cop's attention, etc.). But now this will reinforce the notion some might have that smart car drivers must be smoking something to be seen in such a wee car...
I think we could do without this sort of association.