I have seen several interviews with Craig himself, and he is pretty much a scumbag. I can understand having an adult section of a website, but personally, I would hope that most website owners would shut that section down imediately when they realize that children are being sold on their site.
Craig, on the other hand has the attitude, "Hey, don't look at me, I just provide the web page, I am not the one commiting the crime".
I am sure at his speeches that he gives, he talks about how he has changed the way people sell items locally online, and I am sure he feels pretty proud of it. My thinking is, if he deserves the credit for changing the online selling world, I think he can be given the credit for aiding the child sex trade. In my mind, the fact that he has never shown any remorse or seem to care about what is happening on his site, tells me he is just as guilty.