He has a good point in general. Too often, both here and on other forums, I'll start a thread. The first half dozen or so responses are good, but the longer it gets, the more likely people will chime in without having read the thread, and you can tell, because if they had at least read your own first post, they wouldn't have said what they said.
Then there are those who will come along and rip you a new one for making a statement or asking a question (not referring to this site, but to other sites)... saying things they would NEVER dare say to your face, even without any expletives. I had this happen to me a few days ago on Google Plus. I had had enough of it and deleted my entire Google Plus account. I almost never posted there anyway, so good riddance.