Here’s how to build a consensus in the words of Joe Alcamo to Mike Hulme (climategate email here: http://www.climate-gate.org/cru/mail/0876437553.txt):
‘I am very strongly in favor of as wide and rapid a distribution as
possible for endorsements. I think the only thing that counts is
numbers. The media is going to say “1000 scientists signed” or “1500
signed”. No one is going to check if it is 600 with PhDs versus 2000
without. They will mention the prominent ones, but that is a
different story.’
This is huckstering; not science.