Have you heard of the Shopping Cart Theory? It's a viral story that's been making the rounds that proposes that the absolute best judge of a person's character is whether or not they return a shopping cart to the corral.
The belief being that the task is objectively simple, correct, and for the common good, but provides no benefit to the person actually taking the time to do it. Nor is it illegal not to return your cart.
Thus, outside of the most dire emergencies, any person who opts out of doing so is a bad member of society.