Politically Incorrect to help those enslaved ?

I'm on vacation (and thus this is unedited), but had this article forwarded to me and wanted to make a comparison. Human Trafficking is a serious problem throughout much of the world, in particular Asia and the Middle-East. Stories of people, mostly women, enslaved to work in garment factories, rice fields, brick factories, brothels, and homes are excruciating to read. They are most often not allowed to leave the premise. They are told that if they are disobedient in any way that they will be punished or their family will be. In many countries, such as Thailand, the police and other authorities are of little or no help as they are paid bribes to assist the slave masters and indeed, in some areas this type of slavery is considered socially acceptable.

When International Justice Mission (IJM) is prevented from putting up advertisements with a message to people who might be enslaved that they can contact IJM for help, Americans rightly go ballistic. The Brad Pitt's and Angelina Jolie's of Hollywood, the elected folk in Washington, and others scream about the lack of freedom of speech and how horrible these people are who do not want to help those enslaved.

Yet here in the U.S. this happens and what do we do? If someone plastered bus ads all over telling people that if they were enslaved in a Christian organization and couldn't leave for fear of harm that here was someone who could help, I'd not be offended in the least. So, why are these SIOA bus ads offensive? We know from a number of cases in the U.S. in just the past year that some number Muslims are held hostage, eg, enslaved, under threats of death. Why does Miami-Dade Transit not want to help these people escape?

If I wanted to put up an identical ad, though trying to reach women enslaved and forced to work as prostitutes in Miami, would that be deemed offensive to pimps who enslave these women and thus not allowed on Miami-Dade buses? If it said:

Threat over your head? Leaving Prostitution? RefugeFromProstitution.com

What third world is Miami-Dade becoming?