Interesting interview with the owner of the PUAhate site from November. It points to my experience with the site, which was that it was only a subset of the forums where people would post the kind of stuff objectifying women that is making the headlines. It was a forum called "****** Advice" which can sort of be compared to the "Abandon All Hope" forum here. Of course, that's the section the interviewer chose to focus on, as it's the most scandalous.
Most of the stuff debunking Dating Gurus and Pick up artists was not mysoginistic, IMO, it was conducted more in the way that we rip apart Bigfoot videos and faith healers here. But of course it's the sub forum that's making the news.
Overall, I think the PUAhate site is getting a bad rap. The owner's intentions were good, and I think the site has played a very important role in really taking PUAs down a couple of notches and chipping away at their profit base, and helping many guys realize that they don't need to go the route of using stupid tricks and techniques to "seduce" women, they just need to start socializing and talking with them like normal people.
http://thehairpin.com/2013/11/puahate
ETA: It's also worth noting that despite being called a "PUAhate regular" Elliot Rodger only posted 63 posts on the site, and would criticize other members for NOT wanting to "rise up" and engage in violence against what he called "the enemy." As I've mentioned before, I was a regular reader of the site and remember his posts because they stood out as being in stark contrast to the majority of what was being posted there. Of course, the media publicizes the sensational and picks out the choice tidbits left by the weirdest or most extreme/trollish users. One could make the James Randi forums look pretty depraved using similar techniques.