@FrançoisG.Dorais I still see that information. -- E.g. you are now shown on the main site as "Last seen 25 mins ago" / "2021-08-11 19:16:37Z" (with mouse over). -- Maybe the change is rolled out over some time, and different users see it not simultaneously(?)

Well -- that information is available under the 'Profile' tab (and not under the 'Activity' tab which is shown in the screenshot) -- but wasn't this always so?

I still see that information, just like before -- but maybe this is mod-specific(?) -- Could you perhaps provide a screenshot? In any case, I think if that information is really not generally available any more, this would be a loss.

This is no software bug. -- I migrated the question (instead of merely closing it) because I thought Science Fiction & Fantasy may be a good place for it. Obviously, I was wrong.

My concern with the referred question is that it may give a false impression of what is on-topic on this site, and encourage people who don't know the site to ask similar-level homework questions -- and then complain that these are closed, pointing to that question which got lots of upvotes. (As to number of upvotes -- the question went to the HNQ list and thus got notable exposure to people outside MO.) In contrast, for example questions on the history on mathematics, on teaching mathematics or on aspects of academia relevant to mathematicians are not likely to encourage homework questions.

That looks like plagiarism. -- Which question do you refer to?

As Gerry Myerson correctly says, your question has been removed / autodeleted by the "Community" user. For autodeletion criteria, see here. For now, I have undeleted your question -- but if it doesn't get answers or upvotes, it will soon be autodeleted by the software again.

I'd say -- just act according to common sense. Situations may differ, and one cannot make a fixed rule for every conceivable case. If similar situations happen to occur repeatedly, it may be the right time to think about a rule for those cases.

Yes -- in theory, one can imagine very complicated situations. -- However, what is relevant in practice is which situations one encounters in practice. Can you perhaps link to some more examples?

Your suggestion to post using an anonymous account in such situation seems reasonable to me.

I see that comment correctly, with the formula in one line and the dot at the end (and the line break before the formula). Which browser do you use?

I think it is a good question, and I'd be glad if it remains open.

@FedericoPoloni Probably you mean this question?: mathoverflow.net/questions/393693/…

When googling for math problem sites or math homework sites, indeed it seems one needs to search pretty long until one comes across MO.

@MartinSleziak On that list of search keywords, I just see: "(not provided): 1777449 visits, (not set) 253729 visits, curve similarity: 1350 visits" -- and that's all. -- Not very helpful.