Do a Google search for MLM and the top three sites are MLMwatch, MLM Survivor and What's Wrong with Multi-level Marketing. All three sites are what I would consider Anti-MLM.
Search Quixtar and and sites 2 thru 6 are Anti-Quixtar.
I am no fan of Quixtar, in fact in my opinion, they deserve the critics. I just find it interesting.
Most of the Anti-MLM sites do not present both sides of the story. There are scams and scammers in MLM, but there are good companies and good people as well.
Psssst. Pro-MLMers, lil' help?