Let me try and answer your question by relating my experience in a behavior modification program (not affiliated with WWASP) adn why I did not tell my parents about it or anyone for that matter for almost 25 years.
When I was in the program, the motivation is to ultimately get out. If I got some good from the program, then so be it, but the nmotivating factor was to get out and by graduating, not running. Couple that with the steadfast rule that was drilled into us each and every day (15 months for me)" what you see hear, do here, see here, remains here". I saw many many children started over for talking about what they saw while on their phases.
As I said, I spent 15 months in the program, 12 to 20 hours a day, 7 days a week. The re-education and thought reform process takes it toll and by the end of the 15 months and even for many years I actually thought my time at the program and the things I "learned" were actually helped me AND I convinced myself that the ends in my case justified the ends. When I got out, I was just darn glad to be free. I didn't want to think about what happened. I wanted to be as far away as possible. Every time I did try to talk about it my family would say "look at what you've done with your life because of the program". They only wanted to say how wonderful the program was. How can a young adult or child fight that attitude? It was enough trying to put my life back together. I pushed down the pain and harmful memories for years...got on w/my life the best I could. Serious traumatic situations sometimes take a long time to manifest themselves.
I have female friends that were raped. One particularly close friend told me about a rape that happened to her almost 30 years ago. I was the first person she had ever told. The thought never crossed my mine that she was not telling the truth 'cause it took so long to tell someone.
Having experienced a harmful behavior modification program and experienced the way children are treated in this country, I would tend to believe the kids.
So I hope I shed some light on why a person might not tell their parents or the police or any other authority right away. Tho, I wonder if you really wanted to know or are you just some wwaspy supporter trying to just post your justification crap. Even if you are, I hope anon, that you consider what I wrote, cause it's the truth.
Straight Survivor
St. Pete, 1978 - 1980
Not any more.