Across all Stack Exchange network sites I have seen a lot of users with "Reinstate Monica" in the username, and I am not sure what this means.
Here's a good deal of insight:
In a nutshell:
Monica Cellio was fired from her position as a volunteer moderator for requesting clarification on a topic that was important to her. The request for clarification was taken the wrong way, and she was removed from her position as a moderator. She and other users want her back as a moderator and show their opinions through their usernames.
Thinking about it, there is even a much shorter and straight forward solution: turn to the profile pages of such users. Or at least, it should be that easy!
I do think that the large majority of users with such "Monica nicknames" also updated their profile page to explain the why!
Actually the whole point of the logo and nickname change was to get people to read the additional information given on the user profile. I admit that it doesn't work for all such users, but for many it does!