I have a habit of being a sarcastic dickhead to people who I think are missing something obvious, or who I highly suspect of being a troll or other type of dishonest user account.
I decided to try, for a while, holding back on that. I would just explain why I disagreed with people, or why I thought their argument was terribly flawed, without needing to add any snark or rudeness to it. I was amazed at how much more productive the messages and conversations were. It sounds obvious in retrospect, but I somehow thought that the delivery would lose something if I couldn't be an asshole at the same time I was delivering the message.
Live and learn, I guess.