I am not into expressing emotion much at all, let along strongly and "in public". But, I don't mind if other people do it as long as they're being genuine. Attention whoring isn't welcome, but genuine distress/anger/grief/happiness is all good.
I think it's considered awkward because we live in an emotionally guarded society. Socially, emotional expressiveness is seen as less "appropriate" because it involves a display of vulnerability that makes people uncomfortable. When we aren't comfortable with our own emotions, it's difficult to empathize with another person's. That said, the only time I mind emotional scenes are when people are having juvenile outbursts in professional settings. I've already talked about my dislike of inauthentic emotional displays rooted in superficial rubbish. I find that quite idiotic. Other than this, people need to be more open and understanding.