I was a Moderator here once upon a time. During my "reign" I protected this question due to the number of junk answers it was getting. (Ignore, for now, the fact that we probably wouldn't let such a question stay open nowadays.)
I have since resigned as a Moderator. However, when I view that question, I can see the "unprotect" link. I have not seen that link on any other protected questions, so I can only assume that I can see it because I was the user that originally protected it.
I have not followed through to see if I can actually unprotect it, but it seems to me that displaying that link to me is unintended. (Granted, this is an edge case. I mean, how many protected questions are out there that were protected by former Moderators?)