I respect people who continue to learn, even if they learn that I'm often full of shit. But put-downs can be a valid form of debate if they're on point. People have been using them for millions of years, and that's not likely to change. I get your point, though, that there might be too much of it sometimes. Sometimes the best that we can hope for is that we can disagree without killing each other.
Thank you for response, tuna. I look forward to more of you ideas.