To protect children, exuses are not suficient.
Right now; parents, schools, children homes, responsable in public places and streets; must explain - inform children about such kind of contacts aren't correct, arent' their mistake (often there are feelings of quilt), are no games and can only harm.
It is also important teachers are talking openly about such sick behaviour in class rooms to break the shame and fear in which harmed children are dwelling.
Also a telephone number, where children can talk without fear should be given.
"Despite the fact that we are a ceaselessly transforming stream, interdependent with other beings and the whole world, we imagine that there exists in us an unchanging entity that characterizes us and that we must protect and please. A thorough analysis of this reveals that it is only a fictitious mental construct".
Shechen Rabjam Rinpoche.