Say you're looking at cans of food at the grocery store. It's not a super crowded day, and my cart isn't all the way to the side, but there is barely enough space to pass. Maybe only I can tell because I'm standing closer. A polite but smug woman stops and asks me to move the cart without attempting to get by first, just assuming it was too tight. So I pretend not to hear at first, the second time she says something I say something to the effect of "pretty sure you can make it." So she tries, and it's tight but fine. I feel guilty, I admit this is a petty thing to do, but is it that terrible?