Entrapment
I feel sorry for the women in these situations, but in most cases their own decisions led them there. A women who is in college suddenly becomes a sex slave? No honey, your choices led you to that place.
What concerned me about the film was the entrapment procedures used by the police. If an attractive adult female approaches you and says they will do a sexual thing for money, that is entrapment.
That is tricking someone to participate in an illegal activity. The people they need to go for are the pimps.
Or just regulate the sex trade. The *beep* that goes down in the documentary only happens because the USA is bible-bashing and puritanical. Regulate the industry and no one gets hurt. No one. The prostitutes make money, the clients get what they need.