How come Zarhym's posts are so snide sounding

I mean I know that the people he is posting to are ill-informed and immature. But why bother posting to them to begin with?

I log onto the forums and the blue's responses are all at people who haven't even started reading the available info on their problem. Zarhym makes this a little worse because he has an element of sarcasm or something in his writing.

Kinda starts the forum "experience" on the wrong foot since 2/3 of the Blizzard posts on top are Zarhym wailing away at trolls.

I think you should respond to people that are commenting/asking in a legitimate way or treat the posters seriously in your responses.