You know you are right. I realized that when I went thru my last hip surgery and I spent my day glued to the forums. There is a lot of anger on here and most posters post directly the first things that comes to mind.
I find being positive and being complimentive goes a lot further and as the saying goes regardless of how frustrating things go, "if you don't have anything nice to say, don't post it".
I think simply not answering a thread or only posting a kind comment without directly answering a thread that you know you don't agree with, is a lot better. Posters/Forumers never take negative advice or comments into practice EVEN if its advice they asked for in the first place, so why even post it in the first place.
I agree, everyone needs to rethink their posting style and revamp how they want to word things. This site as a lot of absolutely fantastic people and some great advice and ideas and we're all going to take advantage of it if we take more care of each other.