As the subject says, when I went to the home page of BadMovies.org, the ad at the top was a flash object advertising porn. After I moved my mouse over the ad, clicking on anything else on the page did not work. I had to close down my web browser to do anything again.
After looking through the advertising companies, I think that I might have found the ad you were speaking about. It showed several women in bikinis, each in a square tile with a play icon in the center. Is that the ad?
I couldn't get it to replicate the error you were seeing, with it messing up your browser. But that ad is one I would consider a junk ad, so it has been removed. If I found the right one, you should not be seeing it again.
Thank you for that, even if I did not find the exact ad you mentioned, it did help me find one I did not want running (along with a few others that I disabled from that network).