The quick and easy solution: Don't care about what others think. What I mean is, if your entire post is about your opinion on someone else's opinion, it's probably a post not worth posting. This goes for you as well, Ragnarok.

Focus on the topic, not the person. Further inter-personal ramblings of "he said, she said" or any forms of quick "gotcha" snips at others will result in the thread closing. That includes the slightest attempts at having the final word.

Just stop it.