If there's someone in Oklahoma with the power of eradicate prostitution, that's Brian Bates. Neither judges nor police, it's this citizen who puts a halt to whores and their clients.
The vigilante Brian spies the ladies and records videos until a client arrives. Then, he follows them and, when they're having sex, Brian appears with the cameran and telling them that the video will be uploaded to YouTube.
Is that effective? I think so. Almost 60,000,000 views speak for itself.