What you should know about the documentary about Ashley Madison

"Let's just say if you do bad things, bad things will happen to you."

So says a voiceover in the trailer for "The Ashley Madison Affair," an ABC News/Hulu documentary about the now-famous website that people who want to have secret affairs use.

The documentary tells the story of the site's rise and final fall, even though it still exists. The site was hacked and the names of its users were made p....