Sounds like an idiotic post 😵💫.
1. Nobody forced the girls into this business. They could have said NO.
But greediness made the decision.
2. Their parents neglected their duties.
3. The customers (should be prosecuted) didn't (or didn't want to know) ask for their age.
(or the girls said to be 18)
4.. At this age, young people know exactly why they are hired. (Did you ever heard that word "internet"?)
Btw, at that age you're responsible by law for your actions (not yet in Thailand) in many countries.
More important is to convince the girls that this business is not the right way to spend life. (at least until they are 18)