I don’t really believe this either because:
A) why would the other actors have been allowed to see all this for a start?
B) she’s supposed to have been a relatively big name by then? Why would they risk her being traumatised and not coming back or working anywhere else? It’s one thing to attack a grown woman who wants to be in movies (horrible obviously), but children could be truly disturbed, refuse to work, and of course tell their parents and anyone else.
The thing about what Feldman said is that they were drugged and coerced, and his mother just didn’t care. It makes sense like that, but I think this sounds a bit far fetched.
Still, what kind of creep makes this up?