Yes, at least for some things it should be the choice of the child's whether they want to share something or not. I see that this may have indications in later life too where not only things but people's bodies and minds become community property.
It is possible that those like Dennis in the story above feel they have the rights to a persons private world and with the voyeuristic culture we have developed, lines from looking to touching are likely to get increasingly crossed. And if they are met by resistance, violence is more likely as they have not learned the emotional intelligence and control required to handle 'not getting what you want'.
As you are very well aware but I will repeat here, these formative years have deep impacts on children in bothe positive and negative. And again as you know, many people's attempts at 'good' actually drive a host of developmental problems in the future.
The road to hell is paved with good intentions, my professor used to say. Unfortunately your right that these ideas that are formed about "things"cross over into how people interact with other people.
The future is not just that others will feel that bodies or minds will be community property, it is that the people themselves will believe this and offer these things willingly, which is infinitely worse. The coercion is happening now, so it will seem normal later. examples of this are facebook, tinder or ...insert google app here. Tinder is particularly dangerous experiment, I can see the effect it has on my much younger class mates currently. Sex is as easy as ordering takeout you just need to get the timing right for availability. It reminds me of a pre-cursor to behaviour described in Brave New World (refer below). Even my class mates can't imagine what would be the next progression from here, but I think we can all see where this will go.
https://steemit.com/teamaustralia/@louisbettong/aldus-huxley-s-predictions-of-today-and-future