I agree this must happen but our communities keep it hidden, I would say to all parents to be alert, of anyone that comes over, if its relatives for a sleep over, we should be checking where they are sleeping and noone roaming the house at nights.
It's very scary. And we should tell our children (not directly if someone touches you) that if anyone does something to upset them then they must have the courage and confidence to tell their parents everything, and never to be scared as we are there for them.