First time I heard that one. I worked at the grove during the early 2010s, so that would have been before my time. While I was there I never witnessed anything too suspicious. Women and children are strictly forbidden from entering the grove, and the entrances are guarded by essentially college-aged mall cops who don't make nearly enough to keep something like that a secret, the exception being one day when riot police were called in because of a protest. There are also ~30 shuttle drivers and ~30 baggage and commissary workers constantly roaming the camp, as well as guest performers and musicians constantly coming and going. If I were a pedo snuff film maker, I can think of several better places to murder children without getting caught.