Well, this would be an interesting topic to ask my sisters --those that have much younger children.

I'm sure the 3rd sis, closest to my age is relieved her kids are adults now. She and hubby planted the Internet surfing/email computer in their living rm. To increase transparency of Internet surfing activities when kids were younger.
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Catriona, maybe one day decades later, you'll let your brother know that you were on the lookout for him. At this time, it might explode in your face if he knew what you did to monitor him. It takes awhile for siblings in some families to realize..siblings (those with healthy relationships, either close or distant) are one another's friends --for life. Then he will appreciate it..