Certainly there seems to be some reason to be suspicious of WWASP and Cross Creek's methods, due to all the lawsuits... but forming an opinion based on one account by an anonymous and admittedly troubled teen on the internet would probably be rather premature judgement.
I find it particularly hard to believe that she was led through an airport with a belt around her chest and an "escort" towing her along by it, without a cop or security noticing and having a problem with that.
If her account is accurate, it certainly does sound very harsh, yes. I wouldn't think that most parents would resort to something so extreme, though, unless their teen was literally self-destructing before their eyes.
Hard to know what to think about it.