Coach Staff to Think About Consequences

It's October. Ready for Halloween sales? To get you in the mood, here's a truly frightful story from Making Money Is Not Illegal, Immoral or Fattening. I hope it scares you into coaching your staff to think about consequences.
"A customer goes into a store one weekend. His purchase comes to $487.62. The man goes home and installs everything. He finds that he has a clamp left over. It's a 29¢ clamp. That Friday, he goes back into the store and buys more stuff to work on his project. After the cashier rings it all up, he says something like, 'Oh, by the way, I need to return this cable clamp.' The cashier says, 'Do you have your receipt?' He pulls it out, and she looks for the 29¢ item on the receipt so she can circle it. Then she says, 'You know, we sell those in a plastic bag so we can scan them. Do you have your plastic bag with you?'
"He says, 'No, I don't have the plastic bag.' The cashier says, 'I think we've got a problem.' The man says, 'I don't have a problem. Call your manager.' The on-duty manager comes to the register and says to the cashier, 'What's the problem?' The cashier says, 'This customer is trying to return this cable clamp, and he doesn't have the plastic bag.' The manager says to the customer, 'Do you have your plastic bag?' "The customer takes his items and walks out of the store. A couple of days later, he contacts the store owner and says, 'I'll never be inside your store again.'"
"The guy had been spending more than $5,000 a year in this store, and they turned him away over a plastic bag."
Want more painful details? See page 114 of the book.