I know the theory sounds too easy, but it is possible.
remember, the "boys" have had ample opportunity to dispel all rumors, to exonerate themselves, to make the island nice and peaceful again by just saying....."we were all drunk and went for a swim" and so and so happened.....we panicked".......
instead, they drag the whole island including their "beloved" parents thru this nightmare?......don't think so....
whatever happened may have been an accident, but it was an accident that involved some crime on their part.....rape...filming a rape scene ...rave party....etc....
they are protecting their own mushy little butts....
remember too....they pointed at two innocent guards and got them in trouble too.....