Comment by antonchekhov

I don't understand why, if the recipient of the initial detached "hello" is annoyed at the communication tax of having to acknowledge it before the querier gets to the real point of the convo, why in the "preferred" example, he/she responds to their gratitude ("ta") with a "np"? That seems like just as much pointless communication noise, only at the other end of the chat. When I say thanks to anyone in real-life verbal communication, their (usually a grunt) "no problem" adds nothing.