I don't use Adbrite at all, at least not anymore in the last 2 years. Never had any success showing their ads. The porn thingy you happened to come upon makes me want to steer as clear away from them as possible. Those kids are minors, no more than 15 or 16. That is really sick!
You guys seem to use the internet with one eye open. There is so much of this kind of stuff floating about the internet. Google jailbait and you get loads of it. :|
Even if they are 18 plus its horrible on business. I don't want people going around saying i harvest child porn on my servers. Someone put why dont i block the site. I will have to look into that. I do believe you can set it up to where you can approve ads before they are ran but that can be i pain in the ass im sure and it would be easier just to use another service