Padlocking clothing in Indonesia

I saw this story: An Indonesian town is asking its masseuses to padlock their skirts and pants to make it clear that prostitution is not an option. Well, that's weird. The women's affair minister in Indonesia says it's not the right way to prevent promiscuity, as it implies that the women in the wrong. I agree with her. This is weird. How about a sign in the window saying you can't buy sex here? Wouldn't that be easier? Call me silly, I guess. Anyway, how does one padlock a skirt? What a strange story.