I don't mean to ruin anyone's moral outrage but how do you know exactly that abuse has happened if it hasn't been reported? I would also question the study that was done simply because what it alleges is so horrific that it is more probable that the study is flawed than accurate. It is very easy to accidentally mess a study up and particularly a study of this kind.
You're not implying that guiding questions asking about molestation might maybe get some flawed answers are you!? 8O
Yeah, I'd pondered on their methods too. But, they went on to say 'small percentage', which would imply that it's at a level in keeping with normal human population, or possibly lower, so they may not have hit far off the mark.
Personally, I think we should be appalled anytime an article discusses the notion that 10 human beings twisted enough to rape another human being, could find one another under normal social circumstances, and act something like this out. The fact that they're peace keepers and such is sort of beside the point.
But that peacekeepers and aid workers are as flawed as the rest of the population... should that really be a surprise? I don't think so.