Have you quarreled a customer?

May I know if you have quarreled a customer? If so, what was the reason? I am asking you this because awhile ago, I entered a store near my place and the people were running away from the store. They were so afraid something may happen between the store owner and a customer. I did not leave the place, I want to know the cause. I have a business and I want to know why so that I can prepare myself in case that scenario will happen to my small business. I asked the store guard what happened and he told me that the customer inserted 5 unpaid canned goods into his eco bag which the customer denied as stealing them, but she cannot show the receipt. The receipt was only good for the goods she already paid and placed in her eco bag. The customer was so angry that she got wild, so the store owner dispatched her and he took the 5 canned goods worth $ 40, and called the police. The customer was brought to the police precinct

Well, it would not be a good idea to quarrel with your customers. We can try to settle things amicably than quarrelling with them

If the customer has a weapon, it is better if the security guard checks the entry of the customers who look suspicious.

I did this when we still have a family business. The customers were so rude towards me. I was too young way back then.

I have lost my temper once and had to shout and exchange words with a customer. That's what I have consciously tried to avoid ever since that happened.

I have not quarreled with customers, I know some customers have unrealistic demand but in a situation like this, I like to play cool

As much as possible we have to avoid it there might be bad effect like revenge. We never know their real attitudes. They might harm us, so let's remain calm.