This is such a ridiculously cynical interpretation. I'm sure there at least a few people out there who behave as you describe but that is not normal. Greeting people before launching into a topic is a social norm. Even if you make a reasonable case that it is outdated in the context of instant messaging that doesn't change the reality of it.
Someone doing something that you consider outdated or inefficient does not imply that he is malicious.
You specifically attributed malice and I'm responding to that.
As to these supposed harmful effects. If you find the most basic of social pleasantries to be such an unmanageable burden then I'm likely better off not associating with you. Do you get angry at people who greet you as you walk by on the street? Navigating that interaction similarly demands some small part of your attention after all, however brief it might be.
Someone doing something that you consider outdated or inefficient does not imply that he is malicious.