Add “Cross-posting” as a standard reason to close the question

Question

Often, people ask the same question on multiple StackExchange websites. While this might be sometimes fine (a question did not get enough attention, the posts are cross-linked, some time has passed from the initial question submission - see CS Discussion on Cross-posting), there are a lot of obvious cases when a question is asked simultaneously at all StackExchange websites.

I suggest adding as a standard closing reason.

Closing -> CrossPosting -> Enter a question link or numeric id

or

Closing -> Duplicate -> Enter a question link or numeric id and allow for non-CompScience links.

Example of CS question, for which one has to type a custom reasoning for off-topic for a question that is certainly crossposted to CS and SO.

Or does one has to flag such post in need of moderator attention?

Answer 1

I've never seen a feature of this type on any other SE site, and I don't think one exists at all. I think this is to encourage the OP's to modify their duplicate posts to fit the separate communities rather than to close such questions automatically. I can certainly inquire further about it, but I'm less than optimistic about it.