I think 0.20 did something like this or at least it shows the active chats where this person is, I am getting a lot of addresses I don’t know from where they came, it is useful to know from what chat an address was added to my contact list.
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0.20 did not show the provenance of contacts (why do i see this contact?) nor group members (who added whom?). however, yes, it’s a good idea, yes 
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The issues about of suspicious addresses were also already reported (and closed without fix).
This workaround should also help you: