If you want to give negative feedback, make it constructive. Otherwise, its pointless. That is the difference.
Besides, this is in the spam thread for a reason.. Why bother being negative where folks go specifically for a laugh?
You appear to have lost all semblance of a grip on reality. The original post itself was a joke based on the criticism of the graph. You also seem to fail to grasp the irony of arguing about negative feedback in the spam forum which is where people go "for a laugh".
It was the people arguing against that (timtadams) who went completely batshit insane. His post basically said that the original graph was correct, because if you changed this, this, this and this then it could be seen as being right. But that isn't what the graph said, so the graph is still horribly wrong. By simply pointing that out in my first post I was more constructive than he was.
If I said the moon was blue that could be seen as being a true statement if you considered the possibiliy of me being colour blind, or that maybe in a parallel universe decorative extra-terrestrials decided to jazz the moon up a bit, or perhaps you could change the words "moon" and/or "blue" to two unrelated words which do add up to a true statement, such as "the grass is green". In that event my statement COULD be seen as correct...but it isn't because that isn't what I said.