Prevention is difficult. My son witnessed blatant trafficking and sexual assault of a teen aged girl in a motel outside of Hamilton Ontario. She cried for him and his girlfriend to save her.  He called police from the motel, who showed up two hours later to say they had no authority to access the room. We wrap men in great swaths of privacy protection in Canada and then we wonder why so many of our Canadian men are paying to rape little girls in all motels on the outskirts of every centre, and at the massage parlours for our downtown boys to enjoy.