Say you were a guardian or parent and get to decide when a child can get a phone or use a computer and get internet with it. If you wish you can also install software and change router settings to what you see fit.
Some parents decide to forbid the internet completely, others are more relaxed. Some go the helicopter route, and some do not care whatsoever what their kid does online.
What is your policy on letting a child use the internet?
His son had found some more... interesting areas of the internet (aka porn). He collected a selection of his browsing history and sat him down. They then went, video by video, having an open and honest discussion about it. Dad had FAR more tolerance for mortifying embarrassment than his son did. He learnt to clear the history at least.
The 2nd discussion, 6 months later, used the router logs instead.
I'm not sure I would use this particular method. However, it was apparently highly effective at making his kids think things through (for better or for worse!).
