I.D Check for Credit Cards

I was at the mall yesterday, and when I was in line to pay for some books, the lady that was in front of me was arguing with the cashier. I didn’t know what was going on until I decided to eavesdrop their conversation. The lady was yelling at the cashier because the cashier asked her for I.D to make sure the credit card belonged to her. Well, the lady went on and off about how the cashier was making her waste her time and how she wanted to speak with a manager. Meanwhile, I was waiting and yeah kind of mad because the only time she was wasting was mines. She could’ve just showed the cashier her I.D, and she would’ve saved the cashier’s time, her time and obviously my time. I don’t understand why people get so mad when they are asked for I.D; it’s for their own safety.