Walking on Egg Shells

You know that person in your life you always want to confront but can't due to the fact that they'll blow up in your face regardless of the topic even if you are being as diplomatic as possible? I'm dealing with one of those right now and I wish it would stop. It's like walking on egg shells.

My question is, why is it that the loudest, rudest and most aggressive people always get what they want? It's like everyone around them is appeasing them just to keep them from causing an embarrassing scene. It's a lesson in classic negative reinforcement. And I'm just as guilty as anyone else.

I would give the loud, rude thing a try to see if it would work for me but it makes me sick to my stomach to act that way.