Also, everyone is reading this as some kind of creepy weird sharing kinks thing. Guaranteed this is just overbearing parenting 101. Anyone raised in or around extreme Christian groups reads this for what it is: child monitoring software and forcing your values on your kid.
I am sure your 17 year old signed up, wholly voluntarily, to not look at porn. I’m sure this wasn’t pitched as, “I’ll even do it too, and set it up so you get alerts for me!” Right as they took away a near adult’s ability to explore his sexuality.