The current closed poll question about buying from kids' lemonade stands ignores an option: buying the lemonade, but not drinking it. Face it, kids are not well-known for their sanitation. If they can't find a spoon to stir the lemonade, they can use their fingers, and probably not washing them first. And Lord knows whether or not they picked their noses. I will often buy a lemonade from the stand, but I never actually drink the stuff.
I recall doing some calculations at one time, at a Costco. I looked at the bulk price for Country Time Lemonade mix, and for cans of soda, and figured that if the kids just put some cans of soda in an ice chest, cooled with ice and water, and charged a buck a can, they could make a lot more money, and people wouldn't be as suspicious of the product, and therefore much more likely to buy.