Msn Etiquette

I could not understand why people do not know about msn etiquette. Must there be a course to educate these people or could I say it is common sense understanding which these people should know or should I say they have no brain.

Was pretty pissed with it for the past few months and I thought I could endure, but today I gonna warn these people to stop irritating me.

What happened was:- Have you encountered someone who has a busy status set in their msn?Since it is already shown as busy, they still can msn you and asked bo liao thing like "hi", "what u doing?", "are you at home?", etc. Does it matter to you whether I am at home or not? Communication via messenger means you can communicate anytime anywhere. Does it means conversation is different if I am at home? It really puzzled me..Tell me about it. The best thing was when you have replied, everything will pause for like 10-15 min before that person could reponse to you. If there is nothing much to talk about, please stop disturbing me and boiled my temper. I could not endure such behavior and sorry to say that I do not have the patience to wait for your response.

Go ahead and curse me, but I going to tell these people, I do not give a damn of it and stop wasting my time.