I appreciate the word "play" being used, BlackOp, and I agree with your method. Very En of you.
Sometimes people who have little to offer or are having difficulties dealing with troubling feelings (And we all know who those guys are. Heh.) exercise their wits for a variety of reasons other than what they appear at a surface reading.
As INFPs, Chat, we run into trouble trying to figure out people's sincerity and we have that danged compulsion to keep explaining ourselves ad infinitum.
Here's what works for me:
I try not to speak until I have confidence in my answer. Then, if challenged, I have three choices. I can agree, disagree or put it on the back burner for future reference. Arguing or explaining, from my perspective, only goads on further irritating behavior. Because it isn't a conversation; it's a game. One that you are not supposed to win.
A perusal of posters' habits over a period of time separates the conversationalists from the trolls.
There is a compulsion in one's youth, as we try to figure out what we really are and what we believe in, to bounce it off of others. A normal process.
We have some information and, darn it, we want to let others know that we are becoming more sure of ourselves.
Where we back ourselves into corners is our stubborn-minded insistence (and assumption) that we are correct. And taking even another step closer to the social abyss we attempt to convince others of such. In an attempt to win respect and admiration we end up alienating the very possibility with tantrums, name-calling, arrogance, so forth. Our needs are being thwarted, for goodness sake.
What does it take on both sides' part? Some insight is good. Some patience and acceptance of others' need for respect and admiration help. A good group grope now and then?
All a part of the maturing process, and yes, it's an irritating conversation stopper.
Now. Don't anyone argue with me about that because I secretly know I'm right and you're wrong!
PS. It also doesn't hurt to remember that we really don't know many of our conversationalists and there's a good chance that some of us may be struggling with personalty/thought disorders which mar their ability to have friendly encounters with others. "More to be pitied than censured." I believe the phrase is.