It seems a certain Professor and key proponent of Mann-made Global Warming is displeased with the video "Hide the Decline" published online by Minnesotans for Global Warming. Via Anthony Watts:
Penn State University’s Michael Mann, one of the central figures in the Climategate scandal, has threatened legal action against Minnesotans for Global Warming (M4GW) over the group’s popular satirical YouTube video “Hide the Decline.” The No Cap-and-Trade Coalition, a group that includes M4GW, responded today at an event at the National Press Club, releasing Mann’s threatening letter and an updated version of the “Hide the Decline” video.In response, M4GW have released an updated - I think better - video, Hide the Decline II.
“We understand why Michael Mann is eager to silence public discussion of the hockey stick scandal,” said Jeff Davis of No Cap-and-Trade, “but truth is an absolute defense.”
Update: I've linked to this video at Vimeo, since the sheeple at YouTub have decided to take it down. It should work OK now.