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When you overpopulate a room with too many listener's seats, is there a way you can globally delete all seats in one easy command?

Go to the Listener Seat Tables (Ctrl+Shift+S) and select the seats you want to delete by dragging the mouse down the left most column. Then go to Edit/Delete Listener Seats. This would waste all the selected seats.
Of course this would work for other items, too.