By saying things like "Then don't reply!" you are telling others what they should have said or not said. You can only control your own actions.
No, I'm simply pointing out how that poster's explanation made no sense. If someone didn't want to engage you, they won't engage you. "You can only control your own actions" is a nice axiom, but that doesn't mean we shouldn't point out the folly of other people's actions. It just means we shouldn't lose sleep over them, which I'm certainly not. I'm simply making an observation of human behavior that I see all the time that I think is fascinating.
It's sort of like when a driver is tailgating someone, supposedly in a big hurry, and then when they finally are able to pass them, they get in front of them and go slow or brake check them and just generally waste time playing games with the other driver, which proves their time wasn't their true concern, but rather their ego.
Or like when someone says they've got better things to do than to argue, yet continue to reply over and over after stating they were done, thus proving their true concern was to have the last word, not to do those "better things." etc.
We are already covered this. Without knowing the motive of the other person you would not know if they want a debate in the first place. This is why you are left forever wondering why did they say "something stupid".
I'm not wondering why. I know why. Explained in post 19.