I was at a restaurant the other night, seated by the front window. The restaurant has a bowl of fruit in their foyer, so customers can grab an apple, pear, orange, or banana on the way out. A nice gesture, I think.
Well, soon enough a scruffy looking guy on a very nice bicycle rides up to the restaurant, leaves his bike on the sidewalk, takes off his backpack and leaves it on the bench out front, walks into the foyer, and carefully picks out 4 golden delicious apples. He goes right back to his backpack and bike, stuffs the apples in a grocery bag in his backpack, puts that back on, and then asks a couple leaving the restaurant if they have any change they could give him. Not getting any, he then rides off on his expensive-looking bike.
A restaurant like that, or a grocery store like your local Whole Foods, can certainly afford the occassional charity juicing. But if the idea becomes widespread, and many people start to simply take the fruit, how long will it remain an eating/shopping-here-is-optional situation? This is your ethical dilemma: do you REALLY need that charge, or are you doing it simply because it's there?