Cutting the checkout line
This is probably the easiest and most straightforward ways to offend other people. By cutting in line at the supermarket, your will most likely make everyone around you angry. 99% of shoppers surveyed agreed that the worst thing someone can do at the grocery store is cutting in line.
Leaving the line to grab another item while your groceries are being scanned
This situation is not as bad as the ones previously mentioned, but it does make people feel slightly uncomfortable. Most people will understand that you forgot to buy something important, or that you might have to replace a certain product with another. However, try to grab the missing item as fast as possible and don’t waste time on the way back.
Ignoring their kids and letting them misbehave
Grocery shopping with kids can be a real adventure, and a lot of parents fail miserably. We know that all children misbehave sometimes, especially when they are not getting the things they want. However, but education should provide a foundation for shopping behavior. No one wants to deal with kids who are yelling, crying, or running around the supermarket, so, please, avoid being in this situation at all costs. Some parents avoid taking their children shopping altogether, so, if you know your kid will misbehave, you might want to consider hiring a babysitter.