This is a good dad. It's every father's job to take their mistakes and help guide their sons so they don't make the same ones. Let me tell you something strikingly obvious about this dad. This dad totally got caught looking at porn in the past. He knows the humiliation that it causes, so he's passing on the sage old advice of, "always go in incognito mode." This is a lucky kid. Many other dads would have sent their kid to Bible camp in response to this.
I had a similar situation happen to me, except it was the other way around. Once I started looking at pornography I knew that I needed to hide it. Here was my logic: if I have to go through such lengths to hide my paper porn, I should have to do the same thing with my digital porn. Let's just say that other people in my household weren't so good at covering their tracks.