Dunno about graphing posts of posts. I have been on this forum for about 9 years but somehow appear as a newbie now [which is of no matter]. The biggest subject matters and threads have invariably mentioned 'chooks, cats or Round-Up'. Chooks cos they are of perennial interest and when you think permaculture animals they are at the top of the list.
Cats is a vary divisive issue with most people being in one camp or the other and a lot of emotion comes in. I once kicked off a thread on composting cats, now I did this tongue in cheek knowing it would provoke responses. I found it a lot of fun but the reality was it did probably unduly distress some members. There is a current cat thread that I have left alone for this reason.
Lastly, glysophate/glyphosate[??] or roundup. This topic has evoked such emotion at times as to literally chase people off the forum. Gladly, nowadays the merits, if any, and evils of Monsanto and its products and practices are more widely known and understood. This means this topic can be discussed without folk being too hot-headed.
One of the craziest and spiteful threads was one I was involved in was over the US holiday of Thanksgiving, a huge thread that rolled on for days and perhaps weeks. It was one of those issues where fact trumped belief and to the believers the facts were simply wrong. The silly thing about it all was the only permaculture thing mentioned in the entire thread was something about pumpkins. Now with a number of forums to choose from this type of thread would likely turn up in a 'views' type section and with more moderators now it would be shut down or extremely well monitored at that time it was just in a general forum.
IMHO, some of the best threads have a topic and 1 or 2 replies but 200 plus views. They are often technical in nature so whilst I enjoy reading them and admire the writers, generally, I am too dopey to contribute... So I dont think graphing thread popularity could actually be a productive thing.
mike, Katherine NT in the hot dry tropical savannah bit of Australia.