I think the point is that we need to consider the fact that these crimes are often preventable. That falls in the lap of parents and chaperones.
I think that the problem is more one of naievete than neglectful culpability. My husband did some busines in Curaco(the next island) some years back, and was warned by the shipping agent about staying close to his hotel and never taking a cab out of town after dark. It may be beautiful on those islands, but it's not the US.