Duplicate, maybe. (How to see if a question was a "hot network question"?)
While the HNQ list creates a lot of cross-site traffic (which is wanted), it also causes issues on those sites sometimes, in particular on sites like PuzzlingSE where the 'hotness' of some questions strongly distorts the "voting = quality" paradigm.
However, I'm not about fixing HNQ here. Instead, I'm wondering if there is a good method to find out (via query or otherwise) if a question has in the past ever been placed on the HNQ list. ( See also: What stats should I track in an HNQ list monitor? )
And if not, I would like to propose this as a general feature request. The information whether or not a question has been on HNQ is a valueable meta-info which ideally should be captured in the database.
It would allow
easy flagging of such questons in some site design (i.e. an addtional icon)
easy filtering for/against such questions in the search query
notification and user statistics ( see: Should we be notified if we make it onto HNQ? )
interesting analysis of the impact of HNQ in various contexts