My recent Wiki Genealogy Feed included this edit from yesterday:
[unlisted] edited the Biography for (profile) [Thank [unlisted] for this]
Now, the feed did also have several messages to the effect of
Admin WikiTree edited the Email for [unlisted].(Automatic deletion of e-mail address after 30 days with no response.)
so perhaps one was the same person that made the edits, but those messages were from June 8, and the edits were made on June 9.
I'm disturbed that unlisted people are able to edit profiles; that leaves the PM no way to contact them if they did something egregious. If someone wants to have their WikiTree profile unlisted, that's fine, but they should then have to sacrifice their edit capabilities.