alt Hacker NewsIf I ever feel like writing my own "12 Rules for Life", one of them is going to be called "Don't yell at the Barista" or some version of that. You can get angry, but not at the person who would probably get fired for showing initiative. Find the people actually responsible and yell at them.
Being angry is not synonymous with being abusive. Your assumption that they would be fired for showing initiative says a lot about the society that you live in. I'm glad that generally where I live we expect people to take responsibility and their managers to support them. It doesn't always work of course.