soft answer...

I've learned that if you keep your cool and respond calmly and rationally you only end up making the person who is angry, angrier. Sometimes if you really want someone who is so mad they can't see straight to see your point of view you have to get right up in their face and speak your mind. But just make sure the topic is really important to you or you could end up making an enemy out of someone who could have been your friend if you just let them rant and get their issue out of their system.

I ignore a person who starts yelling at me. I also dislike a person who writes with anger. Anger is purely a personal thing let that person keep it with him. He has no business to show it off.

You shouldn't answer back to a angry person. They are not going to hear you while they are angry anyway and the odds of them getting madder is highly likely. Until the get over being angry or stop yelling at me it has been my policy to wait until they are calmed down. Then we can talk about why they were angry.