"Professor" James McCanney has been making some rather scary predictions regarding comet C/2012 S1. So I've started a page on him. I'm not sure whether he actually qualifies as a "2102 proponent", but he's certainly a cosmophobia proponent, with his "electric comets as big as planets" crap, his book "Surviving Planet-X Passage" and his survival equipment business.
I get the feeling McCanney is going to milk this comet for all it's worth over the coming year.
Anyway, the page is here - http://www.2012hoax.org/james-mccanney