That's the Southern Poverty Law Centre, one of the mainstays of the US Civil Rights movement since the 1970s, who the law to fight against bigotry and for equality.
In their Spring Intelligence Report "The Year in Hate and Extremism 2011" they have three articles on MRAs and their war on women:
Men's Rights Movement spreads false claims about women
Misogyny: The Sites
Leader?s Suicide Brings Attention to Men?s Rights Movement