If you don't trust someone to be the gatekeeper of the group, you logically should not trust them to view your information at all: they could always copy it and forward it on to other parties.
Maybe there's a difference if you do not trust their competence, rather than their intentions. You have recourse there, though: it's easier to test (or improve) someone's competence than to do the same for someone's intentions.
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If someone besides me is the gatekeeper to the group, then how is this helping privacy issues? Seems like I would be losing control not gaining it.
It does make sense to classify relationships and share based on those classifications, but I bet there is a better way.
If you don't trust someone to be the gatekeeper of the group, you logically should not trust them to view your information at all: they could always copy it and forward it on to other parties.
Maybe there's a difference if you do not trust their competence, rather than their intentions. You have recourse there, though: it's easier to test (or improve) someone's competence than to do the same for someone's intentions.