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.
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: