Erica, I think automerge works slightly differently from the way you describe it, and I think we once discussed this.
ANY of your collaborators can merge ALL your public profiles, without reference to you, whether you have any particular collaborator on manual review or auto-merge.
As far as I understand it, the only difference between manual review and auto-merge is slightly different, and best illustrated by an example with hypothetical names.
Suppose:
1. I collaborate with Erica but not with Ann.
2. Erica collaborates with both me and with Ann.
3. Ann wants to merge one of my public profiles with one of hers. Because Ann doesn't collaborate with me, she can't complete the merge herself. But because Erica collaborates with us both, Erica can complete the merge.
4. Therefore:
(a) If I have Erica on auto-merge, Erica can auto-complete the merge.
(b) If I don't have Erica on auto-merge, she can't, and she would have to manually review the merge.
So my decision on whether to put Erica on auto-merge is not based on whether I trust Erica, but rather on whether I trust the collaborators of Erica with whom I do not collaborate myself.