A specific case of a question that has been migrated from StackOverflow, rather inappropriately in my opinion, since it is a question on programming and not on mathematics. I've asked on Meta.SO, and a suggested method of dealing with this is for a moderator to close/delete the question on Math.SE and flag its antecedent on StackOverflow so the Mod there can clear migration history.
But of course, we run into again the question about when the moderator should cast a binding close vote on a question. So my question is: is this a case where the moderator is allowed to close the question and bounce it back to the originating website for expediency?
Argument against that is the usual: this involves a judgement of whether the question is appropriate for this website. And so should be similar to how we should gather quorum for close a question for being "off-topic".
On the other hand, we are not really closing the question: just sending it back to where it originated for further review there. And dealing with this more efficiently may allow the OP to more quickly get the answer he wants, rather than having the question bounce around in limbo.
What are people's thoughts on this?