I am a founding member. I usually look at such ideas as global warming in a historical vein. Not unlike a flat Earth, monsters, mermaids and a nuclear reaction triggering the obliteration of the entire Earth. We are but children, with very little knowledge, and a HUGE ego.
Who could forget the impending disaster of Y2K ?
I'm still laughing at the posting of a 1975 Newsweek article last week about the global COOLING threat. One of the solutions was to nuke the polar ice caps so they'd melt faster and allow the earth to warm.