Maybe I am missing something, but we don't seem to have a close reason for questions that are wildly off topic. Do we need a custom close reason for questions that are clearly off topic here, which may or may not fit on another site. Maybe something like:
This question appears to be off-topic because it is about not about academia. It may fit on-topic at another site within the SE network, in which case please flag the question and suggest where you would like it to be migrated.