It's wrong to take away someone's livelihood.
Karen is being kicked out of a store after arguing with an employee because she was trying to redeem an expired coupon deal.
Karen wants to resolve her issue with the coupon.
Karen comes to her senses when she gets home and decides to put the issue behind her while being too embarrassed to ever go into that particular store again.
Karen exaggerates the behavior of the employee to the manager the next day saying that the employee was unfair and rude.
The employee that kicked Karen out eventually forgets about Karen as they continue their employment.
The employee is fired by their manager based on Karen's story.