When using public spaces, either for work or recreation, it's important to behave in a manner that is considerate of others, because, 1) it creates a more harmonious, better world for yourself and others. And, 2) you might get publicly shamed.
Sadly there are a lot of people, many of them full-grown adults, who treat the world like their own private playground. There are few things more infuriating than having dealing with the fallout of a stranger's selfish or disrespectful behavior. BUT at least there is a place to publicly shame them: it's called the internet. And shaming rude/terrible people is arguably one of its best and most useful purposes.
1.) These rude grocery shoppers.