Use this phone app to fight trafficking. I have.

The TraffickCam app enables travelers to submit pictures of hotel rooms around the world. The images are matched against a national database used by police. News article on this ingenious app.

Simple as that.

Help fight trafficking by uploading photos of your hotel room. These photos will be used to determine where perpetrators of sex trafficking are committing their crimes.

Download here:
http://traffickcam.org/