What did mommy and daddy think their little girl was going to do on that island? Sun tan?
I went on a senior trip to the beach with a bunch of my classmates, and I went out to eat and sun-tanned on the beach. My classmates did the drinking and stuff. Maybe her parents thought she was smart enough to not drink and flirt with strangers.
That's more to my point. You go on vacation to party and have a good time. Bad choices or not, you don't expect something like this to happen. More to the point, why didn't she stick closely with her group of classmates? Was she forced to leave, or did she leave voluntarily? If she was forced to leave, you can't blame the teen. If she left voluntarily, well that was a mischievous and poor choice.