This may not be a popular post and I might be off base as I don't know exactly what's going on behind the scenes, but with the way things have been progressing I'm not sure you guys are handling this the right way. In fact, from what I can see thus far the actions in this thread may actually be helping Drew.
The standard WF approach of 'reputation mismanagement' on its own really won't work here. Drew actively wants his reputation destroyed. He's probably taking more pride in the rankings of these threads and websites than people here are. He already stated his goals were fame, traffic and money. Unless there's some sort of hammer coming where he'll be rightfully arrested and prosecuted for what he's doing to these poor kids, all the reputation management, media attention and even harassment and abuse will end up helping him.
In this thread there have also been a good handful of addresses posted, many of which are almost certainly the current residence of people who have absolutely nothing to do with Drew and may not be in for some completely unwarranted abuse. Personally I don't agree with you guys going after the guy's family as well. I mean, it's on thing to inform them of his actions, but by the sounds of things it might be getting excessive to the point of harassment.
Since this thread started, not only is the site still up and no closer to being down (from what I can see publicly anyways) but it's received a massive spike in traffic with it's Alexa ranking going down a full 6 million places in 48 hours. That's a ton of more eyes on the site, and worse, more people contacting these girls, attention and help which I'm not certain they want. I'm sure most are just trying to help but there's sure to be some stalkers and creeps in the mix as well. He's even added monetization to the site now, so there's a chance that he's making a profit because of your efforts.
Worst of all, the pressure from this thread has caused Drew to cover (if poorly) some of his tracks and hide evidence, making the eventual and deserved criminal investigation more difficult. He's already removed all his mobile Facebook photos and changed the name on his Yahoo Answer account where he openly admitted his guilt in the current investigation into pandering.
I could be totally off base, as I'm not in any of your Skype groups and can't see what's going on behind the scenes. I just think that you may want to think carefully about what you're doing. The goal should be to put this guy behind bars, not get him daytime TV interviews and a VH1 reality show.