My god people. Relax. The Escapist do not "approve" every ad that runs on their site. They get a contract with some other company, who advertisers give their ads too, then the company plasters those ads over all the websites they have ad space on. The staff wouldn't have known this was going to happen any more than we did. In fact, some of them may even not have seen it, since it seems to be region specific like most ads. I can't see them anyway.
https://twitter.com/#!/AndyChalk
See, right there. At least one staff member had no idea, and is actually quite unhappy with it. Calm down, wait, it's not as simple as them taking it down. As I said, they don't put the ads up, they just sell the space. They'll have to contact the ad provider and get it sorted.
As for my opinion on it, while I'm not one to get up in arms about porn, it doesn't really belong on this site at all, so I hope this is resolved quickly.