I do see your point, Hans.
However, the written word, particularly on internet forums, tends to lose some of the nuance present in everyday conversation. There is a certain tone and inflection missing from these types of communication which can render them irritating to the uninitiated. It is a good idea, if you find a post irritating, to read it aloud to yourself and experience what the writer is attempting to communicate with the verbal tone and inflection that grant a great deal of meaning.
I hope that helps.