@dustin Apologies for the late reply. I've mulled it over and still can't really come to a conclusion that it is definitely off-topic here and on-topic on SO. A lot of the underlying issues would appear to make it as much a poor question there as here.

@NajibIdrissi IMO (intersection) should definitely be done away with. I'll get a request off to a CM to get them to kill it. The (morphisms-of-schemes) could really be gotten rid of by almost anyone by simply editing it out of the (currently) 8 questions tagged with it.

@ArthurFischer Thanks. I'm going to start removing morphisms-of-schemes then.

I am not sure, but this comment suggests that this post on meta might have been closed prematurely.

Is there somebody who could look into it? (I don't know what kind of advice can I give there.)

@MartinSleziak The problem appears to have just been a misreading of the Fundamental's answer to the first duplicate choice. I've changed what the question is a duplicate of. While the answer there is not quite as full, the linked MSE answer gives better details.

Thanks!