I don't get upset about the baby crying. That's just a baby being a baby.

What I get upset about is when the parent yells at the baby for crying. As if that would do anything other than make the baby cry harder. Maybe they think it'll show the passengers that they're trying to do something? It only shows that they have no emotional intelligence and are probably not stable enough to raise a child. Especially when the yelling is accompanied by shaking.

Yes, I've seen it. On a plane.