This means acknowledging that life, with all of its opportunities and challenges, also occasionally has a dark side to it. Having acknowledged this, they should then set about ensuring that pupils are streetwise enough to be able to deal with that dark side rather than sheltering them from it.
Teenagers are naturally inquisitive and if they know that material is being filtered from them, they will find a way to access it. It is better that they should be taught to develop their own judgement about whatever material they may see on the Internet, and to be able to assess for themselves its validity, rather than passively relying on a piece of filtering software to do it for them.
Stanford le Hope,