aterpster :
I agree fully , the hint was in my last sentence.
LAX is not KTM ,and the 300 USD/month local TWR controller is not going to challenge the authority that issued the NOTAM and who apparently thought a 400ft displaced threshold was no problem for the RNAV procedure , and is also not going to challenge the crew of a TK A330 who apparently agreed to perform that approach.
Somewhere down the line it would appear that very few people understand what " AR " really means, and I include myself in this.
But that said, I do not think one of the main cause of this accident was the displaced threshold.