Education is necessary regardless of the identity of the perpetrator. And it doesn't matter how frequently it happens - it happens, therefore we should take steps to reduce it.
It should be more focused on relationships, identifying abuse and problem solving in those sorts of situations. Not wasting time and resources on stranger danger (which is again, is incredibly rare. It'd be like focusing energy on how to survive a zombie apocalypse instead of spending time educating about taxes and mortgage rates)