Not even a scientific conference.
The Heartland Institute paid $1000 to anyone willing to give a speech, as well as paying for their hotel, expenses, and travel costs. Hmm, I don't hear of that happening at a lot of scientific conferences.
Furthermore, the document the NIPCC produced is "the work of 23 authors from 15 nations, some of them not scientists." (As compared to the IPCC's hundreds and hundreds).
According to the New York Times, "when an organizer made an announcement asking all of the scientists in the large hall to move to the front for a group picture, 19 men did so."
C'mon guys, it was just a stupid PR stunt by those whose political interests are served by denying climate change. It's hardly even deserving of argument.
This reminds me of when you'd get 100,000 people protesting against the war, and the media would give equal time to the 300 crackpots across the street protesting in favor of the war.