Apropos of nobody in particular, people with a lot to hide and a big, lucrative scam to protect will frequently threaten those telling the truth about them with frivolous defamation suits.
There is a whole lot of money changing hands in the troubled teen industry in general.
There is a whole lot of smoke there.
I haven't seen it myself, but I've heard the movie in question was very uncomplimentary towards WWASPS and I wouldn't be surprised if they'd want it suppressed.
Julie