But not, unfortunately, on global warming matters, as there was the case where one of the AGW activists who was also a Wiki editor went through and rewrote all the articles about the Medieval warm period and the mini ice-age saying that scientists had now come to the conclusion that they didn't exist, (not true) just to try and give credence to the now defunct hockey-stick graph which had eliminated them to back up the claim by M. Mann of unprecedented warming. He was exposed and banned from wiki.