Every time I see "closed due to inactivity" implemented, the outcome is that new feature get added rather than fixing existing problems, because the memory of those problems only persists in the users day to day life. The developers have no useful record.
But, I doubt that can scale. I imagine there's some happy place sitting near semi-automated "duplicate" recognition, and a voting system, to give the users a voice. Closing due to inactivity is never a happy place (unless it's sitting waiting for required user feedback maybe).
