Why not do the same with drug users? when they bust some user who has 1/4 oz weed or some low amount of crack or coke why not spend thousands on billboards saying "I am a drug user"
if they want to cut down on the human trafficking, shut down the places where the girls ARE working at.
going after the johns one at a time won't stop the flow of enslaved women..
you do not with the war on drugs arresting 1 user at a time.. you win by shutting down grow houses, store houses, distributors etc.. price goes up and less of it, makes it harder to get on the streets..