I agree with this, and I would add that groups interacting under the influence of such rapid, impersonal dismissals, has the effect of removing all nuance and subtlety from their language. I have a fear that if I were to take a time machine forward, Jules Verne style, I would see emoticons have entirely supplanted the alphabet.
The internet, it seems to me, is the primary cause of this information overload. And it also makes it so much easier to just “swipe left” on people. In the real world, in a local community, you would not have been able to just walk away from conflict. But in the internet, you almost have to do it to stay sane.