I agree to the rest of your post whole-heartedly. But one thing is for sure - you basically had little contact to kids and don't remember your childhood. Let me tell you - every child not only has a right to privacy but they also execute it.
[removed overly harsh text] (Sorry if you saw that, I overreacted, and I retract this section of my remarks if you did see it.)
My little sister is 16. I work with youth all the time, and talk directly with them about these exact issues. The only times I've ever heard a kid complain about their parent checking on their phone or computer was in the context of them having been caught doing something they shouldn't and getting punished for said deed (some parents did the right thing and included good instruction along with punishment, some did not, but since these weren't my kids, I didn't have a part in that obviously).
I also grew up in a family with 6 kids, and my parents basically tried out different parenting styles with various sets of them. In my case, I was left alone almost completely, only getting my parents attention when my actions were harmful to another family member. I really wish they had spent more time monitoring my computer usage, because I did things I regret and I am having a hard time breaking some habits that I developed then. My little brother received more attention after a while, and has not hit those same problems (he's now 19, and while he had his own rough patches, he doesn't have the same type of lasting problems in that area as I do).
I know this is essentially anecdotal, but I have a fair amount of basis for what I say here, as you can see. So I'm not really clueless in this regard.
If a child grabs Socks the little cat and goes up to his/her room they in all due respect will share a secret. Socks knows and he won't tell the parents that e.g. the child wants to kiss XYZ or has been swimming naked with XYZ - you know - all that stuff.
And that's why I think this discussion is rather hypocritical. I have no right to monitor every conversation my child performs. The only right I have is to talk with them, when parent XYZ tells me that my child is responsible for the use of dirty language/dirty deeds with their child. And that's it. Period.
And basically we should maybe talk about the justification of giving minors mobiles in the first place...
You do know that none of this is at all related to what I proposed. I don't care if a child tells something to Socks the cat (not that we'll have a cat, but I know that's not your point
😉). My child should tell me if they did something wrong, but I'm aware I won't know everything my child does (past the age where I'm not constantly with them). That doesn't mean I don't have the right to know. I have the right to not only ask them, but ask others or put cameras and microphones around my house if I feel like it. I don't plan to monitor my kids in that way, nor do I think anyone needs to, but the fact is, it's perfectly within a parent's rights.
I also don't feel that it's outside my jurisdiction as a parent to question my child about something they have done wrong. I'm not going to do so unless I have some indication that they have done something wrong, but I don't have to wait until another parent complains. If my child does something wrong, and I discover that fact by nothing else than seeing a text message or email, I still have the right to discover the truth and punish the child for that (along with giving them instruction as to how they should have behaved and encouraging them to do the right thing in the future). This notion that I have no right to question my child's behavior is absolutely absurd. Again, it takes away any reason for having parents in the first place.
And yes, I do question the need for children to have mobile phones in the first place, but from the point at which they are free to go away overnight to a friend's house, camp, etc, I feel that there is at least sufficient reason if there aren't any factors that would make it unwise. Not necessary, but not wrong either. I don't think there's any reason for a child under about 10 years old to have a cell phone though.
jW