Well... this is a surprise. I am humbled and honored. Many thanks to the community—I shall endeavor to do my job well. Also profound thanks to the to the current set of moderators, who made this election far more clear and far less acrimonious than the last one. I look forward to working with y'all in a different capacity.
The organization of the moderators team is informal. There is no hierarchy and there are no assigned roles. Of course, a less experienced moderators might ask more experienced ones for advice at times. There is no separate reputation-system either; in principle, there is statistical data on our activity.
While this is not formalized, in practice there is a ...
If it is a private matter, which is essentially equivalent to it being reporting what you perceive as problematic behaviour of someone, then flag.
If it is not a private matter, use the Math's mod office.
Just to reiterate what was said here: Do not use e-mail.
Regarding the specific flag you mention, it doesn't seem to be private. So use the Math's mod ...
I believe Gerry in comments got it right. There's a certain phrasing that many problem statement questions (PSQs) have. Some PSQs are of course very hard (e.g. big open problems) and some are e.g. people trying to cheat on homework, or insert other reason for closing such posts.
Since post reviewing is not always done by experts in your field, it IMO would ...
To answer the reformulated question, I think that problems proposed in a journal do not fall under the contest problem policy. The point of those problems is not to rank solvers, it is to share interesting problems and promote discussion, which posting on MSE only helps with.
Added later: I think the biggest supporting reason for my position is that, while ...
I refer to the official answer on the main meta to
Who can see what in my profile?
I quote a part:
Things visible to diamond moderators only:
how many days you visited the site (and your current consecutive visits streak)
your IP address*
all the names you used in the last 90 days
*mods have to click a link to see this information, the ...
There is no problem in itself with close or identical usernames. There is a quite active user quid on money.se that is not me. There are any number of users named John, some of them likely actually named John others just picking it as some common name. And so on.
This was also said in the message: "even identical user names are possible."
Let's see what are the options:
Delete the answer, leave the question open.
Delete the answer, lock the question.
Don't delete the answer, lock the question.
Don't delete anything, just let it be.
Clearly (4) and (3) are opening the door for further cheating by anyone who sees the solution. And clearly (1) may very well attract more ...