PhD teacher,
I appreciate your concern and certainly don't want to make the lives of retired teachers that are living in China more difficult. While militant is a stretch, it does seem that other methods of warning teachers (and the authorities that should be scrutinizing and interfering with the illegal activities of companies preying on Westerners, teachers in the broader sense, students and even Chinese schools) would be more suitable. Hopefully the retired FTs are doing their part to share what they have learned with newer teachers to help them avoid getting into trouble in China as well.

As for financial issues between FTs and Chinese women, it would be good to know there is some enforcement and protection there too if legal boundaries are crossed.