In certain places and circumstances, yelling is expected. Fun, even.
A football game. A roller coaster. A concert. ["FREEBIRD!"]
In other places, yelling is not expected. Not fun. Really, the pits for everyone involved.
Like, say, my kitchen. At my half-clothed children, making syrup monsters with their waffles, when the clock is at five past We Are Late For School Again.
Or Whole Foods. When a five-item shopping trip turns into WHERE ARE YOUR SHOES.