Sorry to hear that, but gotta ask: Do you think a camera would’ve prevented the abuse? Or maybe would it have happened somewhere out of view of a camera?
Nobody can be certain that it would completely prevent something like that, and world doesn't deal with absolute. However, it would make it harder to perpetrate, make potential abuser more fearful, and, on average, would make it much less probable, this I'm sure of.
I disagree that parents are passive objects here - it's them who are subjects. They are the camp's customers, and they make decision to choose one camp over another depending on which one has this security and which one doesn't, and they are able to communicate their opinion to the camp's administration.