This is an excellent post. I tend to alternate between serious communication and trolling. Sometimes trolling works as bait, if you can calmly ask the responder what it was that bothered them about what you said. Sometimes facts appear blunt, and even callous, if you are unfamiliar with them, or the conflict with something you value.
Maybe that's not what you mean by trolling. LOL, I don't know. I've certainly had my share of heated flame wars, as well, but there are times when a response starts that way from the outside, but after logical, honest exchange, you can create rapport so that people are able to see your point of view, understand what you mean, and why you say it. In fact, a surprising number of interactions end in the other party apologizing and admitting they didn't have support for their view. That's when you see a relationship start to build, curiosity is planted and future conversations can lead to awakening.