My knowledge is as far as i know , and I don't have access to real-time information or personal observations.
However, I can tell you that arrogance or rude behavior in a grocery store or any public setting is unfortunate and can be distressing for those involved or witnessing it. Instances of arrogance could manifest as someone belittling or speaking condescendingly to store staff or other customers, cutting in line, or displaying entitlement in a disrespectful manner.
If you encounter such behavior, it's essential to remain calm and avoid escalating the situation. In some cases, store staff may step in to address the issue and maintain order. Remember that everyone deserves respect, and it's crucial to treat others with kindness and consideration in public spaces.