What a Christian man can do in his community to prevent young people from being devastated by the sex industry

Make sure he has a grasp of what the issues are and start sharing them with others.
Be able to talk about the ways men usually see these matters and how they then look to a father who could get badly burned by the myths and system.
Get this conversation into his church--through pastor, men's group, adult forum.
Assume that some men in the church are being affected by the sex industry and in some cases they have big secrets and major pain. Their addiction to pornography or their being customers of exploited people is causing them family or financial distress.
Get the pastor to look at what is going on and being trained to address and deal with these issues and their fall-out.
Find out what is happening to assist abused youth & high risk youth in the area community and make sure the community responds vigorously to these challenges.
Have men study Scriptures dealing with oppression, people's value, and outcasts.
Work with the men's group to address these issues and help the trapped & lost.
Set up men or others to speak to this issue in the schools and in clubs.
Give leadership by acknowledging what good things are happening (prevention programs, children first, etc.) and call the community to train youth to deal with vulnerability. Is every child ready to deal with running away, treacherous people?