That works right up until somebody says, "God, that cheap jerk makes me crazy," and puts up a sign. Or moves the cream behind the counter, slowing down everybody who needs it. Or switches from the pitcher to the single-serving thingies, increasing cost and waste, so they can more easily refuse to give you one. Or just says, "Man, I've had enough of those cheap-ass internet guys. Let's turn off the wireless and remove the power outlets."

If you want a cappuccino, buy a cappuccino. If you want a sandwich, buy a sandwich. Commerce is a collaboration between buyer and seller. Both sides are responsible for making sure that the value exchange is sustainable.