So, perhaps we should add flaps to the CC checks. You know, seatbelts fastened and check we have some flap selected.
Or we could add it to the safety briefing
"Will those of you seated near the overwing exits please contact the CC if the captain has forgotten to select enough flap"
It sort fits with that "Safety is Everybodies Business" view.
Joking apart, the data should be there as to how often it has been done, who has the figures?